Record Atlas
Belgium · Denmark · Ireland

O'Hagan

O'Hagan, also written Hagen, Hagan, Haggan. Attested in Belgium, Denmark, Ireland, borne by about 5 people in the registers this map holds.

Also written

A person linked these — Wikidata's «said to be the same as», or a family archive that worked it out from documents.

HagenHaganHaggan

Only sounds alike

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

Ohagan

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.

  • English · Irish 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.

  • Read about it on Wikipedia ↗ an article, with its own sources

Q279478 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.

  • English 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.

O'Hagan on Wiktionary ↗ — read at revision 84867030. Text from Wiktionary, by its contributors, under CC BY-SA 4.0.

It is also the name of a place

3 places drawn, the largest being Hagen, Hagan, HagenHagen — 1Hagan — 967Hagen — 198,972
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.

  • Hagen Germany pop. 198,972 a spelling of the name
  • Hagan United States of America pop. 967 a spelling of the name
  • Hagen Austria a spelling of the name

Where it is borne, and where a record names it

Attested in 3 countries: Belgium, Denmark, IrelandDenmark — attested, not countedIreland — attested, not countedBelgium — 5 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 3 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 Elsene 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 ElseneElsene — 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.

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 O'Hagan 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

2,575 of 4,099 volumes held for Denmark overlap the 1800s, 1810s, 1840s, 1870s, 1910s, 1920s, 1940s and 1950s — the decades O'Hagan is attested here. Too many to list, and this atlas does not know whether any one of them names O'Hagan. The commonest kinds: Church and parish registers, Civil registration and vital records, Probate, land and notarial, Cemeteries and burials. See everything this atlas holds for Denmark →

Ireland

Borne — a state counted them — Surnames of babies with ten or more occurrences, 2023–2025 (CSO, VSA110).

Whose archive to write to

851 of 1,568 volumes held for Ireland overlap the 1830s, 1870s, 1880s, 1920s, 1960s and 1980s — the decades O'Hagan is attested here. Too many to list, and this atlas does not know whether any one of them names O'Hagan. The commonest kinds: Newspapers and gazettes, Church and parish registers. See everything this atlas holds for Ireland →

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
Denmark
  • Denmark 4 eras Denmark–Norway → Denmark, after the loss of Norway → Prussia, then the German Empire → Denmark
Ireland
  • Ireland — the whole island 4 eras Kingdom of Ireland, under the English crown → United Kingdom of Great Britain and Ireland → United Kingdom → Irish Free State and Republic in the south; Northern Ireland in the six counties

Find O'Hagan on the map →

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