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Rajo

Rajo. Attested in Spain, United States of America, Belgium, Denmark, borne by about 1,188 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.

Raio

Only sounds alike

An algorithm's guess. Useful for casting a net, and not evidence.

RajRaoRajaRajeRajiRajuRajy

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.

Q36995670 on Wikidata ↗ — the item every line above came from.

It is also the name of a place

This is as close to an origin as this map will go. A surname that is also a place name often came from it — and often did not: plenty are occupations or patronymics that happen to collide with a place, and plenty of places are named after a family rather than the other way round. It is a fact with a source, which is more than an etymology page offers.

  • Ráj Czechia only a phonetic neighbour, not a spelling
  • Raj Poland only a phonetic neighbour, not a spelling
  • Rao Spain only a phonetic neighbour, not a spelling

Where it is borne, and where a record names it

Attested in 4 countries: Spain, United States of America, Belgium, DenmarkDenmark — attested, not countedBelgium — 5 peopleUnited States of America — 129 peopleSpain — 1,054 people
A dot is a country, not a place. It sits at the country's centre because a national register counts a country; nothing here says where in it these people are. A hollow ring is attested but not counted — Denmark publishes which surnames exist and not how many carry each, and a family archive finds a name without counting heads. Sizing those by a number nobody published would invent it. Blank is not absence. This draws the 4 countries where the eleven registers and eight archives behind this atlas attest the name. Most of the world has no surname register this project can read, and the ones that do and will not are listed with the reason.
Belgium, by commune. 5 people in 1 of Belgium's 565 communes, counted by Statbel. The biggest is Gent with 5. This is the only country here that can be drawn this way — every other register counts a country and stops, so a blank elsewhere is a gap in what states publish, not in the name.
1 place drawn, the largest being GentGent — 5

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

1,054 Borne — a state counted them — Frecuencia de apellidos, Censos de población (INE).

Whose archive to write to

This atlas has no birth-year evidence for Rajo in Spain, so it cannot narrow Spain's 35,936 volumes by date — see Spain's own page for all of it.

United States of America

129 Borne — a state counted them — Frequently Occurring Surnames from the 2010 Census; Frequently Occurring Surnames from the 2000 Census.

Whose archive to write to

36,468 of 528,875 volumes held for United States of America overlap the 1960s, 1970s, 1980s and 2000s — the decades Rajo is attested here. Too many to list, and this atlas does not know whether any one of them names Rajo. The commonest kinds: Civil registration and vital records, Probate, land and notarial, Church and parish registers, Immigration and emigration. See everything this atlas holds for United States of America →

Belgium

5 Borne — a state counted them — Family names by municipality, 1 January 2026 (Statbel, TA_POP_LST_2026).

Whose archive to write to

This atlas has no birth-year evidence for Rajo 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).

Whose archive to write to
Attested here, and nothing that survives covers those years

Rajo is attested in Denmark in the 1970s. Not one of the 4,099 volumes this atlas holds for Denmark covers those years — worth knowing before an afternoon is spent on Denmark's shelf rather than after.

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.

United States of America
Belgium
Denmark
  • 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.

Find Rajo on the map →

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