The Name

Five lines of one name, drawn side by side

They may not be one family, and this archive has never been able to say that they are. Five lines that can be documented from a beginning to an end — and, under the rule, everything the name holds that sits on none of them.

Every way the name has been written down

Fourteen forms, each one taken from a document this archive has read. Twelve are the same name; one is a different family; one is not a name at all.

LERENA

The ordinary form in the Rio de la Plata, and the spelling this register uses as its own.
THE BASELINE, AND THE REASON THE REST OF THIS TABLE EXISTS: every sweep this archive ran for its first month was run on LERENA, and the rows below are what that missed.

LLERENA

Sancho LLERENA of Canelones, 1791-1812, and the town of Llerena in Badajoz. And in one Buenos Aires probate of 1889 the SAME MAN is written 'el Doctor LERENA' and 'el Curador Don LLERENA', twice each, in one hand.
A REAL SPELLING, NOT AN ERROR - toponymic from the Extremaduran town, and the commoner form in Spain. THE 1889 PASSAGE IS THE CLEAREST PROOF THIS REGISTER HAS THAT THE TWO ARE ONE NAME, because one clerk used both in one paragraph about one man.

SERENA

'Avelino SERENA' and 'Adelina SERENA' on one 1879 cathedral act; 'Maria SERENA' on the 1865 Costales marriage; 'Mauricio SERENA y Casimira Montano' on Cipriano's of 1875; and the Trinidad diagram of 1858, which writes 'Ramon SERENA' at its apex.
THE S-FOR-L, AND THE MOST EXPENSIVE VARIANT IN THIS ARCHIVE. Trinidad had been swept twice on LERENA. A sweep on SERENA, 12 October 2026, returned children for two couples this archive had worked for weeks and had no children for - Custodio Lerena with Ema Cardozo of the 1911 dispensation, and Juan Bernardo Lerena Pelaez with Eduviges Pelaez of 1894.

SEREÑA

The same Trinidad volumes, with a tilde.
NOT A SEPARATE SEAM, AND WORTH KNOWING BEFORE YOU SPEND A DAY ON IT. A search for SEREÑA returns the IDENTICAL 290 RECORDS as SERENA: FamilySearch normalises the n-tilde. NO TILDE VARIANT OF THIS NAME NEEDS ITS OWN SWEEP.

GERENA

'Abuelos paternos FELIZ GERENA y ROSALIA AGUILAR' on the 1811 baptism of Sancho's son Luis Escolastico - in the same sentence that calls the father LLERENA. Also the unresolved 'Dona Andugara GERENA' in the Rosario confirmations, and 'Doroteo GERENA' at Trinidad in 1934.
THE G-FOR-L, DOCUMENTED HERE SINCE 1811 AND STILL PRODUCING PEOPLE. The sweep of 12 October 2026 found VENANCIO, the first child this archive has ever located of either marriage of Alejandro Lerena the younger, and a fifth child for Cipriano.

PERENA

'Isaac PERENA' on his daughter's 1899 marriage, 'Bernabe PERENA', and 'Pio C. PERENA' - the same man written 'Pio C. SERENA' in the companion volume.
THE P-FOR-L. Gave AMABELIA, a fourth child for Cipriano Lerena and Lauriana Beloqui, dead at nineteen in 1899. PERENA IS ALSO A SURNAME IN ITS OWN RIGHT, so a Perena is a lead and not a relative until an act says otherwise.

LOREÑA / LEREÑA

'ALEXANDRO LEREÑA' on his own marriage act at San Jose, 16 September 1825, and 'Alberto LEREÑA' on the Montevideo cathedral act of 1879.
THE TILDE ADDED RATHER THAN DROPPED, and in both cases by the priest writing the act himself - so this one is not a transcriber's error at all, but how the family's name was sometimes written down at the font.

LEVENA

'Avelino LEVENA' as godfather on the same 1879 cathedral act that writes the child's father LEREÑA and her grandfather SERENA.
CALLED 'AN EIGHTH SPELLING' IN THIS REGISTER WHEN IT WAS FOUND. That one act carries FOUR SPELLINGS OF ONE FAMILY'S NAME ON ONE PAGE, which is the single best illustration on this page of why a search by letter fails.

LORENA

'Alejandro LORENA' and 'Antonina LORENA' in the Cura Vicario's kinship diagram of 1858; 'Custodio LORENA' on a death of 1981; and Pablo Armando himself, indexed as 'ARMAND[O] LORENA'.
THE VARIANT THAT ALMOST LOST THE CENTRAL RECORD. Pablo Armando's army enrolment card - the document this whole archive turns on - was written off on four objections while it sat under LORENA, and recovered on 10 September 2026. A CORRECTION IS LOGGED FOR IT.

LERESA

'Bernabe LERESA' in the transcript of the 1858 Trinidad diagram.
THE PLATE SAYS LERENA. One of five spellings on that single folio - Serena, Lorena, Lorena, Leresa and, four lines above in prose, Lerena correctly. THE DIAGRAM IS THE REASON THIS ARCHIVE STOPPED TRUSTING A TRANSCRIPT'S SPELLING AT ALL.

LARENA

Nineteen people under the A-spelling in Santa Fe and Entre Rios, 1837-1913, and the Gualeguaychu households.
A SPELLING THAT IS SOMETIMES THIS FAMILY AND SOMETIMES AN ITALIAN NAME. At Cayasta it is an Italian colony's LARENA and not ours - a correction is logged - while in Entre Rios it shadows the Lerena Diaz. THE ONLY VARIANT ON THIS PAGE THAT HAS TO BE DECIDED CASE BY CASE.

LERINA

Four arrivals of 1889, written off as Italian - and then an ORIGINAL act of October 1833 naming 'FRANCISCO LERINA y Maria Fernandez'.
THIS ARCHIVE EXCLUDED IT AND HAD TO TAKE THAT BACK. The exclusion rested on the reasoning that Lerina is an Italian surname; an original parish act then used it for a family with a Maria Fernandez in it. A CORRECTION IS LOGGED.

LERRENA

One full-text hit in the Colombian Catholic records.
NOT PURSUED AND NOT OURS - recorded so that the next reader who meets it does not have to decide again.

HERENCIA

Buenos Aires probate transcripts: 'admitio absolutamente LA LERENA', 'verificarse LA LERENCIA', 'non lerena rece en el'.
NOT A SPELLING OF THE NAME AT ALL. IT IS THE SPANISH WORD FOR INHERITANCE. In a corpus made entirely of probate files, the commonest word in the corpus impersonates this surname - which is why '700 Argentine hits for Lerena' was never 700 appearances of a rare name. THE RULE IT GAVE: before trusting a full-text count, find out what your surname is a MISREADING OF, in that language and that document type.

What happened when all fourteen were used at once

The table above was published on 11 October. On 12 October it was turned on the question this archive exists to answer, and the answer held.

THE METHOD

all 121 cells: father-surname x mother-surname, both .exact, no place and no date filter
121 cells, 24 non-zero
The thirteen spellings published at /name/ were turned on the PARENT-PAIR query for the first time. Every earlier run of this query - 14 September and 12 October - set both surnames to LERENA and nothing else.
110 of the 121 cells had never been asked. Ten of the non-zero cells are a spelling against itself: Lerena 39, Llerena 244, Serena 1,346, Gerena 189, Perena 134, Lorena 299, Larena 46, Lerina 42, Levena 21, Leresa 4. Those are OTHER FAMILIES' pools, not this one's.

THE FOURTEEN CROSS CELLS

the cells where the father is written one way and the mother another
16 records in 14 cells
Lerena x Serena 2 | Lerena x Larena 1 | Llerena x Lerena 1 | Llerena x Serena 1 | Llerena x Perena 2 | Serena x Lerena 2 | Serena x Llerena 1 | Serena x Gerena 1 | Serena x Perena 1 | Gerena x Serena 1 | Gerena x Perena 1 | Lorena x Lerena 1 | Lorena x Serena 1 | Lerrena x Llerena 1
ALL SIXTEEN WERE OPENED. Twelve are elsewhere and elsewhen - Cartagena and Magangue in Colombia, Houghton in Michigan, Freestone in Texas, Barcelona, Los Santos de Maimona, Torino, Cabugao in the Philippines, Ceara in Brazil, Cogollos in Granada, Cusco in Peru. Two are Uruguayan, and both are real.

THE CENTRAL NULL, RE-RUN ON THIRTEEN SPELLINGS

father given name Juan Carlos EXACT + father surname <each spelling> EXACT, worldwide, no other filter
Lerena 2 | Llerena 1 | Perena 1 | every other spelling 0
This is the query that has twice been reported as proving Juan Carlos Lerena exists in one record on earth. It had only ever been run on LERENA.
THE NULL SURVIVES ALL THIRTEEN, AND IS NOW WORTH MORE THAN IT WAS. The two LERENA hits are the 1983 Montevideo infant death already ruled out and Pablo Armando's own enrolment card. The LLERENA hit is a 2006 christening at Cartagena, Colombia; the PERENA hit a 2003 birth at Caracas. A null that has been asked in every spelling the archive can document is a different kind of null from one asked in one.

SAN EUGENIO, ARTIGAS - act 110 of 1899

Lerena x Serena, record 1 of 2 - index ark 1:1:XSXQ-HXDB, image ark 3:1:3Q9M-CS2Z-DQC1-2, apid TH-909-72312-116990-27
A NEW LERENA HOUSEHOLD ON THE BRAZILIAN BORDER
The index says: child Juan Serena, born mayo de 1879, father Benito Lerena 45, mother Anastasia Serena 22 - and then names Benito Lerena AGAIN as the maternal grandfather. One man in two roles in one record is the index telling you it has guessed.
THE ACT, READ AT THE PLATE, SAYS SOMETHING ELSE ENTIRELY. San Eugenio, 2 June mil ochocientos noventa y nueve - the index's year is twenty years out. Before Eduardo Castagnet, Juez de Paz of the 1st section of Artigas, appeared Benito Lerena, 45, married, Oriental, jornalero - as the DECLARANT. The child is Juan Ildebel Alvarez y Lerena, born 27 May 1899, hijo legitimo of Honorio Alvarez, 32, Brazilian, a soldier of San Juan Bautista (Brazil), and of Dona Anastasia Lerena, 22. Benito Lerena is the MATERNAL GRANDFATHER, with Dona Maria Cristina, 43, Brazilian. He signed nothing: a ruego de Benito Lerena por no saber firmar.

THE SAME HAND, THE SAME LETTER, INDEXED TWO WAYS

act 110 of 1899, San Eugenio - the capital on Anastasia's surname against the capital on Benito's
THE BEST SINGLE ILLUSTRATION THIS ARCHIVE HAS of why /name/ exists
FamilySearch read the declarant Benito Lerena and the mother Anastasia Serena - two different surnames, from one clerk, on one page, eleven lines apart.
AT 6,000 PIXELS THE TWO CAPITALS ARE THE SAME LETTERFORM, and neither is the S the same hand writes in San Eugenio and San Juan Bautista. The mother is Anastasia LERENA. The pair is not Lerena x Serena at all; it is Alvarez x Lerena, and the Lerena father the index offered is a grandfather standing at the desk.

MAL ABRIGO, SAN JOSE - act 98 of 1910

Gerena x Serena - index ark 1:1:XSXM-8S95, image ark 3:1:3Q9M-CSJY-DSWM-M, apid TH-909-70122-59400-71
AN ITALIAN-BORN LERENA, SETTLED IN SAN JOSE
The index says: Antonina Serena, born septiembre de 1879, at Anal Alrigo, father Pedro Gerena 68, mother Ramona Serena 24 - with a paternal grandfather aged 23 and a maternal grandfather called Jesus Maria.
THE ACT: Mal Abrigo, 5th section of San Jose, 14 September MIL NOVECIENTOS DIEZ - thirty-one years out. The margin reads Lerena Antonina. Before Alberto Infant Aguiar appeared Ramona Lerena, 24, SOLTERA, Oriental, of Jesus Maria, registering a daughter hija natural de la declarante y de padre desconocido - born 2 September 1910. Paternal line: se ignora. Maternal line: Pedro Lerena, 68, married, ITALIANO, labrador of Jesus Maria, and Juana Camacho, 57, Oriental. The index's father is the grandfather again, and its Anal Alrigo is Mal Abrigo.

WHAT THE ITALIAN LINE ON THAT ACT COSTS

Pedro Lerena, born about 1842, declared ITALIANO on a Uruguayan act of 1910
IT PUTS THE ITALIAN STOCK INSIDE URUGUAY, UNDER THIS ARCHIVE'S OWN SPELLING
/name/ keeps an Italian Lerena/Lerina stock apart from this family on purpose, and has always been able to do so by COUNTRY.
THAT SEPARATION NO LONGER HOLDS ON PLACE ALONE. Here is a man of the name, Italian-born, farming in the department of San Jose - the same department as the 1846 act this archive rests a couple on - with Uruguayan-born children and grandchildren who are simply LERENA on the record. No Uruguayan Lerena can now be assumed to be of this stock because the record is Uruguayan. It is not a reason to join the lines; it is a reason to stop treating country as the test.

THE YEAR FIELD OF THIS COLLECTION CANNOT BE TRUSTED

Uruguay, Civil Registration, 1879-2020 (cc=1837849) - two computer-indexed acts read against their plates
BOTH WERE DATED 1879 BY THE INDEX AND NEITHER IS 1879
One is 1899 and sits in a volume labelled Artigas. Birth Records 1899-1900. The other is 1910 and sits in San Jose. Birth Records 1909-1912. The index gave both the collection's OPENING YEAR.
SO A DATE-FILTERED SEARCH OF THIS COLLECTION IS MEASURING THE INDEX, NOT THE REGISTER - and 1879 is an artefact bucket that will swallow acts from any year in it. Every Uruguayan civil-registration date this archive holds from a machine-indexed entry should be read against the volume label before it is used. Both of these records also say, in FamilySearch's own words, This record was indexed by a computer.

WHAT THIS SWEEP DID NOT FIND

the whole 121-cell grid, read for the thing it was run to find
NO JUAN CARLOS, AND NO MARIA, IN ANY SPELLING
The sweep was run to test whether the central null is a fact about the family or a fact about one spelling.
IT IS A FACT ABOUT THE FAMILY. Not one of the sixteen cross-spelling records names a Juan Carlos or carries a couple that could be his parents, and the thirteen-spelling re-run of the Juan Carlos query returns only the card itself. The null is now controlled in two directions - two indexes, thirteen spellings - and it still holds. What the sweep found instead were two Uruguayan households nobody here had met, which is the ordinary return on this kind of work.

THE WARNING ABOVE, AUDITED AND CLOSED

every register row carrying an 1879 date, checked against its source and its precision
SEVEN ROWS. ONE COMES FROM THE SUSPECT COLLECTION, AND IT IS SAFE.
The row above warned that Uruguay Civil Registration 1879-2020 appears to date unread acts to its OPENING YEAR, so any 1879 date from its machine index could be an artefact. That warning was written without checking what this register actually holds.
TWO THINGS CONTAIN IT. First, Uruguayan civil registration does not begin until 1879, so nothing earlier can be touched. Second, the artefact produces MONTH-LEVEL dates - 'mayo de 1879', 'septiembre de 1879' - and a day-level date is a real reading. Of the seven 1879 rows, five come from other sources entirely (CEMLA, the GRO, parish and marriage registers), two are bare years from CEMLA passenger lists, and exactly one - Maria Adelina LERENA LARRIERA, 6 July 1879 - comes from this collection. It is DAY-LEVEL, and her christening of 13 October 1879 corroborates the year from an independent register. No held date needed changing. The warning stands for future reads; it cost this archive nothing in the past.

How rare

Forebears, accessed 8 September 2026: 2,124 bearers worldwide, the 197,177th commonest surname on earth, an incidence of 1 in 3,431,048.

Set that beside the other families in this group of archives. Falco has 46,749 bearers and two independent origins, so no two Falco lines can be assumed related. Lerena is twenty-two times scarcer. The methodological consequence runs the other way:

With a surname this rare, a cluster of Lerenas in one town is far more likely to be one family than to be coincidence. Connections may be proposed on distribution alone — but they must still be proved in the registers.

What is on this page

Where the surname is, where it is not, and what that is worth as evidence. The build checks this list against the page, so a section cannot be added or renamed without appearing here.

Where they are

Bar length is density. Beside each bar: bearers, incidence, and the name’s rank in that country.

Smaller presences are also recorded in Cuba, Brazil, Peru, Ecuador, Venezuela, England, Ireland, Canada, Switzerland, Belgium and the Philippines. Source: Forebears.

Read it by density, not by total

Spain has the largest absolute number, and that is what one would expect of the country of origin. But Uruguay's density is the highest in the world — 1 in 7,962, against Spain's 1 in 52,649. A small population carrying a name at six times the homeland's density is the classic signature of founder emigration: a few people arrived, and their descendants are now a measurable fraction of the country.

Uruguay and Argentina together make the River Plate the true modern heartland of the name. The family's own account — Rosario, on the Paraná — sits squarely inside it.

South Africa's 61 deserve the same reading. For a surname of 2,124 people worldwide, 61 in one country far from Iberia and the Americas is not background scatter. It looks like one family that arrived and multiplied. South Africa →

Spain: one cluster, and it is not where you would guess

Documented Forebears gives the Spanish distribution as La Rioja 27%, Andalusia 25% and Madrid 19% of the Spanish total. Read as raw percentages those look like three comparable strongholds. They are nothing of the sort. Andalusia and Madrid are simply enormous; La Rioja is tiny.

La Rioja carries the name at forty times the Spanish average. Andalusia and Madrid carry it at 1.4 times — which is to say, at about the rate you would expect if Lerenas were sprinkled evenly across Spain and those two regions simply held a lot of people. They are not strongholds. They are big.

There is exactly one real Lerena cluster in Spain, and it is in La Rioja.

And on 11 October 2026 this archive finally put a household inside that cluster. The Spanish consulate at Buenos Aires recorded a power of attorney of 14 November 1900 by two brothers “naturales de Navarrete, provincia de Logroño” — and the province of Logroño is La Rioja, under the name it carried until 1980. So the one place the statistics point at is the one place the documents landed, which is agreement rather than proof: it is where a Lerena in Spain is most likely to be found, so finding one there was always the likeliest outcome. What the household adds is not its region but its shape — mother, father and sons all surnamed Lerena. It is drawn with the lines above, under a different stock of the same name, because nothing connects it to this family and every lane here is Banda Oriental stock documented from the 1790s.

Densities calculated by this archive from Forebears' regional percentages and 2014 population figures; the arithmetic is in data/spain-regional.tsv. Forebears leaves the remaining 29% of the Spanish total unallocated.

Navarrete, Logroño — the one place the name was doubled

A seam this archive has been pointing at for a day, worked on 12 October 2026. The registers turn out not to be filmed, and the one promising record turned out to be Guadalajara.

WHY NAVARRETE WAS WORTH A DAY

open question 1 has named it since 11 October
THE ONE PLACE THIS ARCHIVE CAN NAME WHERE THE DOUBLED SURNAME WAS SETTLED LOCAL USAGE
On 14 November 1900, at the Spanish consulate in Buenos Aires, the brothers Prudencio Benito and Juan Jose LERENA y LERENA, naturales de Navarrete, provincia de Logrono, signed escritura 368 with their widowed mother Isabela LERENA y BASARAN. A Lerena had married a Lerena, in Spain, and the children carried it as a surname of record.
The question was never whether the household is real - the escritura is read and transcribed. It was whether Navarrete's own registers would show the usage was ordinary there, and whether a Juan Carlos sits in them.

THE CATALOGUE ANSWER, AND IT IS A HARD ONE

FamilySearch catalogue, q.place = Navarrete, Logrono, Spain
ONE SUBJECT. ONE ITEM. NO PARISH REGISTERS AT ALL.
The place resolves (SEE: PART OF CASTILLA LA VIEJA, LOGRONO) and returns Census (1) and nothing else. No baptisms, no marriages, no burials, no diocesan series.
SO THE NAVARRETE REGISTERS CANNOT BE READ FROM THIS DESK. They are not filmed and they are not in the full-text corpus - a full-text sweep for Lerena against Navarrete returns Llerena of Badajoz over and over and no Navarrete volume of any kind. This is a null about FamilySearch's holdings, not about the family, and it is the reason this seam now needs a person rather than a session.

WHAT IS FILMED, AND IT IS WORTH HAVING

Catastro del Marques de la Ensenada, Navarrete, Logrono, 1752 - Archivo Historico Provincial de Logrono, filmed 2007
DGS 4386870 (vols 481-484) and DGS 4386703 (vol 485)
Vol. 481 Respuestas generales y Raiz de seglares | 482 Raiz de seglares | 483 Raiz y Personal de seglares | 484 Raiz de eclesiasticos | 485 Memoriales de seglares. Also in the online collection Spain, Catastro de Ensenada 1749-1756.
A HOUSEHOLD-BY-HOUSEHOLD SURVEY OF THE WHOLE TOWN, taken in 1752. It will not name a Juan Carlos born in the 1840s, but it will answer the prior question underneath him: was LERENA a Navarrete surname at all before the 19th century, and was it already being doubled? Vols 483 and 485 are the personal ones. No waypoint established - film numbers only, and they have not been opened.

THE 26 RECORDS THE INDEX CALLS NAVARRETE

record index, surname Lerena exact, q.anyPlace = Navarrete, Logrono, Spain
26 - AND THE PLACE FIELD DOES NOT HOLD
Controlled first: the same query at Reykjavik and at Osaka returns 0, so with m.queryRequireDefault=on the place parameter genuinely FILTERS. Spain holds 375 Lerena records, Logrono 27, Navarrete 26.
THE FILTER WORKS AND THE DATA UNDER IT DOES NOT. The richest of the 26 - a marriage naming a mother Wenceslaa Maria LERENA LERENA - was opened at the plate and is San Gil de esta ciudad de GUADALAJARA, 21 December 1863, two hundred kilometres from Navarrete. A place filter can only be as good as the place field, and here the field is wrong on the one record that mattered.

AND THE COMPOUND WAS A MACHINE DOUBLING AFTER ALL

the same marriage act, read at the plate
THE ACT WRITES LERENA ONCE. THE INDEX WROTE IT TWICE.
For an hour this looked like the second documented LERENA y LERENA in Spain, independent of the Buenos Aires brothers - which would have made the Navarrete usage look regional rather than one household's.
IT IS NOT. Margin and body both read Wenceslaa Maria Lerena, natural de esta ciudad, e hija de Andres, ya difunto, y de Joaquina Lozano. One surname, her father's; her mother is a LOZANO. So the archive's own compound test of 14 September - forty-three doublings, and the only genuine compounds Colombian - SURVIVES THIS, and the Navarrete household is still the only Spanish instance. The test was right and this was the forty-fourth doubling.

WHAT THE SWEEP DID TURN UP: A FORENAME

the same 26, read for shape rather than for place
THREE SPANISH-BORN PRUDENCIO LERENAS EMIGRATING, b. 1892, 1898 and 1899
Prudencio Lerena b.1899 of Najera to New Orleans 1931; Prudencio Lerena b.1892 to New Orleans 1939; Prudencio Velazoo [Velasco] Lerena b.1898 to Brownsville 1946. Alongside Restituto Lerena b.1904 (Boston 1921) and Felipe Mauricio Lerena b.1902 of Bilbao (San Francisco 1922).
PRUDENCIO is the forename of one of the two Navarrete brothers - Prudencio Benito LERENA y LERENA. Three more of them leaving Spain in the next generation is a forename running in a family, and Najera is twenty kilometres from Navarrete. Index-level only: not one of these has been opened, and none is tiered. It is a direction, not a finding.

AND A SPANISH LERENA HOUSEHOLD IN BUENOS AIRES IN 1895

the same 26 - Argentine National Census of 1895
LEANDRO LERENA, b. 1857 in SPAIN, and EMILIA LERENA, b. 1886 in SPAIN, in one household
Seccion 18, Subdivision 34, Ciudad de Buenos Aires. Both recorded as born in Spain, which is rare in this archive: almost every Argentine Lerena it has traced is Uruguayan-born.
THE NAVARRETE BROTHERS WERE DEPENDIENTES IN BUENOS AIRES BY 1900, five years after this census, and this is a Spanish-born Lerena household already in the city. Not joined to them, and not opened - the census entry is the whole of it. Worth an hour before the Catastro, because it is reachable and the Catastro is a walk.

What the name means — the unresolved fork

There are two candidate origins, and the archive does not yet know which applies here.

The Riojan cluster settles it, or very nearly

The two readings above were written before the Spanish regional figures were in hand. Those figures now discriminate between them, and they do not favour the town.

• Against Llerena in Badajoz: if Lerena were a worn-down Llerena, the name should be thickest in and around Extremadura. Extremadura does not appear in the Spanish distribution at all. The 36,828 Llerena bearers are a real and separate family of names; the evidence that ours reduced out of theirs is now weak.
• For a Basque or upper-Ebro origin: the one genuine cluster is La Rioja, on the upper Ebro, immediately south of the Basque provinces and Navarre — exactly the country where the Basque possessive -ena, "the house of", is at home and where Basque house-names spill over into Castilian-speaking territory.

Inferred On the evidence now held, Lerena looks like a Basque-formed house-name of the upper Ebro, carried from La Rioja or its Basque borderlands to the River Plate, and not a reduction of the Extremaduran toponymic.

This is inference from distribution, not proof from a register, and this archive has said throughout that rarity may propose but only documents dispose. It also does not yet touch David's own line, whose earliest certain member was born at Rosario in 1882 and was Argentine by birth. What it does is tell the Spanish end of the search where to look first.

What would actually close it

• The Rosario baptism of 22 February 1882, which names Pablo Armando's parents — and, with luck, where they came from. The passport →
• The family's earliest River Plate records: which spelling, and do Lerena and Llerena ever alternate for one person? Answered 13 September — they alternate, for Sancho Llerena Aguilar, across forty years of Uruguayan registers. What remains is to open those acts rather than trust the attachments.
• An emigration record naming the town of origin outright.
• The La Rioja parish registers — now a specific place to look rather than a country.

Who the Lerenas married at Trinidad

Sources for this page

Forebears (worldwide and per-country figures, accessed 8 September 2026) · Wikipedia, Basque surnames and Llerena, Badajoz · NameCensus. The Basque and Castilian readings are standard onomastics, not a claim about this family.

Two spellings, one town

The forename is the sharper clue

Italy, and the Lerina spelling