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Iordan

Iordan. Attested in Spain, Belgium, Italy, Denmark, borne by about 639 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.

JordánYordan

Only sounds alike

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

IrdanGiordan

It is also the name of a place

6 places drawn, the largest being Jordan, Jordan, Jordan, Jordan, Jordan, JordanJordan — 1Jordan — 1Jordan — 1Jordan — 6,076Jordan — 8,255Jordan — 41,537
Where those places are. A dot is a settlement whose name is this surname, sized by its population — not a claim that anybody of the name lives there. Phonetic neighbours are listed below but not drawn: putting a machine's guess on the ground would dress it up as geography.

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.

  • Jordan Hong Kong pop. 41,537 a spelling of the name
  • Jordan Philippines pop. 8,255 a spelling of the name
  • Jordan United States of America pop. 6,076 a spelling of the name
  • Jordan Australia a spelling of the name
  • Jordan Germany a spelling of the name
  • Jordan United Kingdom a spelling of the name

Where it is borne, and where a record names it

Attested in 4 countries: Spain, Belgium, Italy, DenmarkDenmark — attested, not countedItaly — 2 peopleBelgium — 117 peopleSpain — 520 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. 117 people in 5 of Belgium's 565 communes, counted by Statbel. The biggest is Sint-Jans-Molenbeek with 50. 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.
5 places drawn, the largest being Sint-Jans-Molenbeek, Anderlecht, Brussel, Ganshoren, JetteJette — 5Ganshoren — 7Brussel — 24Anderlecht — 31Sint-Jans-Molenbeek — 50

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

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

Whose archive to write to

8,624 of 35,936 volumes held for Spain overlap the 1770s, 1780s, 1880s, 1930s, 1960s, 1980s, 1990s and 2000s — the decades Iordan is attested here. Too many to list, and this atlas does not know whether any one of them names Iordan. 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 →

Belgium

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

Whose archive to write to

3,982 of 24,426 volumes held for Belgium overlap the 1900s — the decades Iordan is attested here. Too many to list, and this atlas does not know whether any one of them names Iordan. The commonest kinds: Civil registration and vital records. See everything this atlas holds for Belgium →

Italy

2 Borne — a state counted them — Italian comuni publishing their residents' surnames as open data, indexed by the national catalogue dati.gov.it..

Whose archive to write to

242,088 of 1,288,913 volumes held for Italy overlap the 1840s, 1860s, 1940s and 1990s — the decades Iordan is attested here. Too many to list, and this atlas does not know whether any one of them names Iordan. The commonest kinds: Civil registration and vital records, Church and parish registers. See everything this atlas holds for Italy →

Denmark

Borne — a state counted them — Navne registreret i Danmark, January 2020 (Danmarks Statistik, republished by Digitaliseringsstyrelsen).

Whose archive to write to

1,014 of 4,099 volumes held for Denmark overlap the 1830s and 1900s — the decades Iordan is attested here. Too many to list, and this atlas does not know whether any one of them names Iordan. The commonest kinds: Church and parish registers, Probate, land and notarial, Civil registration and vital records, Cemeteries and burials. See everything this atlas holds for Denmark →

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.

Belgium
Italy
  • Carnia, Friuli 6 eras Patriarchate of Aquileia → Republic of Venice → Austria → Napoleonic Kingdom of Italy → …
  • Campania — Caserta and Naples 5 eras Kingdom of Naples → Napoleonic Kingdom of Naples → Kingdom of the Two Sicilies → Kingdom of Italy → …
  • Eastern Sicily — Catania 4 eras Kingdom of Sicily → Kingdom of the Two Sicilies → Kingdom of Italy → Italy
  • Calabria 4 eras Kingdom of Naples → Napoleonic Kingdom of Naples → Kingdom of the Two Sicilies → Italy
  • Carniola and the Slovene lands 8 eras Inner Austria → Austria → The Illyrian Provinces → Kingdom of Serbs, Croats and Slovenes, then Yugoslavia → …
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 Iordan on the map →

The surname dataset · CC0, and downloadable