Sainz
Sainz. Attested in Spain, United States of America, France, Belgium, Denmark, borne by about 26,653 people in the registers this map holds.
The same name, spelt two ways
One systematic substitution — s for z, w for v, ch for h — where BOTH spellings are independently attested surnames. Kosina and Kozina are one man in two clerks' handwriting. Stronger than sounding alike, weaker than somebody having checked.
SainsSaintz
What Wikidata says this name is
Copied from Wikidata, not worked out here. It is crowd-sourced and wrong in places, which is why the item is linked below rather than the claim simply repeated.
- Spanish the language of the name
Which is not where a family is from. A Polish surname can be borne by people whose forebears never saw Poland, and often is.
- patronymic family name kind of surname
- Read about it on Wikipedia ↗ an article, with its own sources
Q100323166 on Wikidata ↗ — the item every line above came from.
What Wiktionary says this name is
Copied from the surname template on Wiktionary, not worked out here, and not from its etymology prose. Anyone may edit it; the page and the revision it was read at are linked below.
- Basque · Spanish what the English entry says it is from
- Basque what the Spanish entry says it is from
- English · Spanish recorded as a surname in these languages
A language here is the language of the NAME, not a country a family came from — the same caveat the Wikidata section carries, and worth repeating rather than assumed read.
Sainz on Wiktionary ↗ — read at revision 90332185. Text from Wiktionary, by its contributors, under CC BY-SA 4.0.
Where it came from
No place of this name is in the gazetteer, so this map says nothing about where the name came from. Search a surname anywhere else and you will be told an origin — that it is Latin, or Italian, or means «joyful». That is etymology, it is usually unsourced, and it is a different question from the one answered here.
Where it is borne, and where a record names it
Country by country
Each country below can carry up to three different kinds of evidence, and none of them is the same claim. A register is a head-count — a state counted these people. A record is one document naming the surname on that ground, narrower evidence and often much older. And a volume overlapping these dates is a document from the right place and years — never a document known to name this surname. None of the three ever means the name exists in that country and nowhere else, or that it exists nowhere but here.
Spain
22,318 Borne — a state counted them — Frecuencia de apellidos, Censos de población (INE).
- PARES Images, free, no account Madrid, Spain
- Geneanet Partly free, partly paid
- Internet Archive Images, free, no account San Francisco, United States
- Arolsen Archives Images, free, no account Bad Arolsen, Germany
- BillionGraves Images, free, no account
- Find a Grave Images, free, no account
23,223 of 35,936 volumes held for Spain overlap the 1820s, 1850s, 1860s, 1880s, 1890s, 1910s, 1920s, 1940s, 1950s, 1960s, 1970s, 1980s, 1990s and 2000s — the decades Sainz is attested here. Too many to list, and this atlas does not know whether any one of them names Sainz. The commonest kinds: Church and parish registers, Probate, land and notarial, Civil registration and vital records, Immigration and emigration. See everything this atlas holds for Spain →
United States of America
3,869 Borne — a state counted them — Frequently Occurring Surnames from the 2010 Census; Frequently Occurring Surnames from the 2000 Census.
- National Archives Catalog (NARA) Images, free, no account Washington, D.C., United States
- Chronicling America Images, free, no account Washington, D.C., United States
- Statue of Liberty–Ellis Island Foundation Images, free, account needed New York, United States
- Findmypast Images, behind a paywall
- Internet Archive Images, free, no account San Francisco, United States
- Arolsen Archives Images, free, no account Bad Arolsen, Germany
This atlas has no birth-year evidence for Sainz in United States of America, so it cannot narrow United States of America's 528,875 volumes by date — see United States of America's own page for all of it.
France
461 Borne — a state counted them — Fichier des noms de famille 1891–2000 (INSEE, fichier national).
- Archives communales de Nice Nobody has walked this one yet Nice, France
- Archives municipales d'Aix-les-Bains Nobody has walked this one yet Aix-les-Bains, France
- Archives municipales d'Albi Nobody has walked this one yet Albi, France
- Archives municipales d'Alençon Nobody has walked this one yet Alençon, France
- Archives municipales d'Annecy Nobody has walked this one yet Annecy, France
- Archives municipales d'Annonay Nobody has walked this one yet Annonay, France
Sainz is attested in France in the 1940s. Not one of the 1,513 volumes this atlas holds for France covers those years — worth knowing before an afternoon is spent on France's shelf rather than after.
Belgium
5 Borne — a state counted them — Family names by municipality, 1 January 2026 (Statbel, TA_POP_LST_2026).
- Rijksarchief / Archives de l'État Images, free, account needed Brussels, Belgium
- Geneanet Partly free, partly paid
- Internet Archive Images, free, no account San Francisco, United States
- Arolsen Archives Images, free, no account Bad Arolsen, Germany
- BillionGraves Images, free, no account
- Find a Grave Images, free, no account
This atlas has no birth-year evidence for Sainz in Belgium, so it cannot narrow Belgium's 24,426 volumes by date — see Belgium's own page for all of it.
Denmark
Borne — a state counted them — Navne registreret i Danmark, January 2020 (Danmarks Statistik, republished by Digitaliseringsstyrelsen).
- Rigsarkivet — Arkivalieronline Images, free, no account Copenhagen, Denmark
- Internet Archive Images, free, no account San Francisco, United States
- Arolsen Archives Images, free, no account Bad Arolsen, Germany
- BillionGraves Images, free, no account
- Find a Grave Images, free, no account
- WikiTree Images, free, no account
This atlas has no birth-year evidence for Sainz in Denmark, so it cannot narrow Denmark's 4,099 volumes by date — see Denmark's own page for all of it.
When it was being born, in France
INSEE counts births by surname and decade from the état civil, 1891 to 2000 — the only dated evidence in this dataset. A name that starts at zero and climbs arrived; a name that falls to nothing left, died out, or emigrated, and the decade it stops is the decade to stop searching. It counts births registered in France, so a family that emigrated in 1900 simply stops appearing, which is information rather than a defect.
- 1891–1900 2
- 1901–1910 12
- 1911–1920 36
- 1921–1930 46
- 1931–1940 24
- 1941–1950 49
- 1951–1960 82
- 1961–1970 66
- 1971–1980 55
- 1981–1990 54
- 1991–2000 35
Whose archive held that ground, and when
Every surname site can tell you a name is common somewhere. This one also knows which filing system held that ground in which years — and those are the two halves of one question: my people were called this, they were there, so who has the paper, and for which century. A name in Croatia before 1881 may sit in a military series and not a county one; a name in the Netherlands before 1811 has no civil record at all, only a baptism.
This is about the ground, not about your family. A register counting a name in a country says nothing about which village. And these are the pieces of a country this atlas has drawn, which in a large one may be a corner of it — Acadia reaches into Maine and is not a statement about the United States, and Bohemia's ground crosses into Poland. Each region's own page says which ground it covers. Where a country is missing below, nothing covers it yet.
- Acadia — the Maritimes 5 eras France → Britain → Canada
- Alsace and Lorraine 6 eras France → German Empire → German annexation
- Belgium and the Southern Netherlands 9 eras Spanish Netherlands → Austrian Netherlands → French annexation → United Kingdom of the Netherlands → …
- Denmark 4 eras Denmark–Norway → Denmark, after the loss of Norway → Prussia, then the German Empire → Denmark
No record region is drawn yet for Spain — which is a gap in this atlas and not a statement about that country.
The surname dataset · CC0, and downloadable