O'Callghan Surname

14,316,765th
Most Common
surname in the World

Approximately 1 people bear this surname

Most prevalent in:
Scotland
Highest density in:
Scotland

O'Callghan Surname Definition:

(Celtic) the Irish O’Ceallachain = Descendant of Ceallachan [v. O’-, and Callaghan]

O'Callghan Surname Distribution Map

By incidenceBy frequencyBy rank
Incidence (high to low)Incidence (low to high)Alphabetic A-ZAlphabetic Z-ARank (high to low)Rank (low to high)
PlaceIncidenceFrequencyRank in Area
Scotland11:5,353,81763,002
United States11:362,458,9331,988,048
PlaceIncidenceFrequencyRank in Area
Ireland201:221,49310,092
PlaceIncidenceFrequencyRank in Area
England31:8,125,123158,686

O'Callghan Surname Meaning

From Where Does The Surname Originate? meaning and history

(Celtic) the Irish O’Ceallachain = Descendant of Ceallachan [v. O’-, and Callaghan]

— Surnames of the United Kingdom (1912) by Henry Harrison

This ancient family derive their origin and their surname from Ceallachan Cathel, a famous king of Munster in the tenth century. Their territory, according to Mr. D'Alton, was partly in cos. Louth and Mayo, but especially in Cork, where 50,000 acres of laud on both sides of the Blackwater, and hence called Pobble O'Callaghan, were occupied by them.

— Patronymica Britannica (1860) by Mark Antony Lower

O'CALLAGHAN: (Celtic or Gaelic.) The descendants or tribe of Callaghan, from Ciallach, prudent, judicious, discreet.

— Ludus Patronymicus (1868) by Richard Stephen Charnock
DNA test information
Display Statistics on:
  • Religious Adherence in:
    Ireland

O'Callghan Demographics

O'Callghan Religious Adherence
in Ireland

Sample size: 20 (1901)

Religious Adherence
in Ireland

View the most religious surnames in Ireland

O'Callghan Last Name Facts

Where Does The Last Name O'Callghan Come From? nationality or country of origin

The surname O'Callghan occurs in Scotland more than any other country or territory. It may occur as a variant:. For other potential spellings of this surname click here.

How Common Is The Last Name O'Callghan? popularity and diffusion

O'Callghan is the 14,316,765th most commonly occurring family name internationally, held by approximately 1 in 2,147,483,647 people. The surname O'Callghan is predominantly found in The Americas, where 100 percent of O'Callghan reside; 100 percent reside in North America and 100 percent reside in Anglo-North America.

The surname O'Callghan is most commonly occurring in Scotland, where it is borne by 1 people, or 1 in 5,353,817. In Scotland O'Callghan is most numerous in: Aberdeenshire, where 100 percent reside. Beside Scotland this surname occurs in one country. It is also common in The United States, where 100 percent reside.

O'Callghan Last Name Statistics demography

The religious devotion of those carrying the last name is predominantly Catholic (90%) in Ireland.

Phonetically Similar Names

Incidence (high to low)Incidence (low to high)Alphabetic A-ZAlphabetic Z-ASimilarity (high to low)Similarity (low to high)Prevalent jurisdiction A-ZPrevalent jurisdiction Z-A
SurnameSimilarityWorldwide IncidencePrevalency
O'Callaghan9523,529/
Ocallghan954/
O'Calloghan950/
O'Calleghan950/
O' Callaghan91340/
O'Callaaghan915/
O'Callaghhan910/
O'Callaghane910/
Ocallaghan904,377/
O'Callagan9010/
O'Calaghan905/
O'Callaghn901/
O Callghan900/
O'Calligan900/
Ocalloghan900/
Ocallgan890/
O Callaghan8668/
O'Gallaghan863/
Ò'callaghan861/
Ocallacghan861/
O'Callachan861/
O Callyghan860/
O Calleghan860/
OcCallaghan860/
O'Cullaghan860/
O'Collaghan860/
O'Calleghen860/
O'Callaghon860/
O'Callaghen860/
O'Callaghin860/
Ocalaghan846/
Ocallagan844/
Ocllaghan842/
Ocallaghn841/
Ocaleghan840/
Ocalligan840/
Ocallogan840/
O'Calagan840/
O' Gallaghan821/
Ogallaghan804/
O'Galligan804/
Ocallachan801/
Oçallaghan801/
Ocallaghna801/
Ocallaghin801/
Ocallaghen801/
O Calligan800/
Ocalagan78118/
O Calloghen760/
O Callaghen760/
O Collaghan760/
Ocallaghan-Hay751/
Ucalaghan741/
Ogalligan741/
O'Colgain741/
O Calagan740/
Ozalgan711/
O Colligan700/
Icalagan673/
O'Culachain671/
Ozatılgan6350/
Akalgan597/
Akatılgan5364/
Hasalgane534/
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Footnotes

  • Surnames are taken as the first part of an person's inherited family name, caste, clan name or in some cases patronymic
  • Descriptions may contain details on the name's etymology, origin, ethnicity and history. They are largely reproduced from 3rd party sources; diligence is advised on accepting their validity - more information
  • Name distribution statistics are generated from a global database of over 4 billion people - more information
  • Heatmap: Dark red means there is a higher occurrence of the name, transitioning to light yellow signifies a progressively lower occurrence. Clicking on selected countries will show mapping at a regional level
  • Rank: Name are ranked by incidence using the ordinal ranking method; the name that occurs the most is assigned a rank of 1; name that occur less frequently receive an incremented rank; if two or more name occur the same number of times they are assigned the same rank and successive rank is incremented by the total preceeding names
  • Ethnic group cannot necessarily be determined by geographic occurrence
  • Similar: Names listed in the "Similar" section are phonetically similar and may not have any relation to O'Callghan
  • To find out more about this surname's family history, lookup records on Family​Search, My​Heritage, FindMyPast and Ancestry. Further information may be obtained by DNA analysis