O'Mahony Surname

39,511th
Most Common
surname in the World

Approximately 13,286 people bear this surname

Most prevalent in:
Ireland
Highest density in:
Ireland

O'Mahony Surname Definition:

(Celtic) the Irish O’Mathghamhna = Descendant of Mathghamhuin, i.e. the Bear.

O'Mahony Surname Distribution Map

PlaceIncidenceFrequencyRank in Area
Ireland9,8601:47872
England2,0601:27,0483,687
Australia4911:54,9816,742
United States3181:1,139,80881,930
France1291:514,90571,423
Canada1241:297,14227,584
Scotland671:79,9085,892
Wales631:49,1204,600
New Zealand581:78,07511,384
Northern Ireland281:65,8944,901
Spain251:1,870,08151,392
Netherlands191:888,79962,169
Singapore171:323,98313,856
Switzerland151:547,52838,365
South Africa141:3,869,836127,494
United Arab Emirates111:832,93427,512
Sweden101:984,67673,605
Qatar91:262,00030,726
Isle of Man81:10,7282,153
Germany71:11,500,780305,602
Poland41:9,502,187181,606
Belgium41:2,874,161111,046
Cyprus31:294,9598,690
Thailand31:23,546,115908,588
Austria31:2,838,47893,604
Turkey21:38,910,711171,901
Russia21:72,061,528727,117
China21:683,660,78330,601
Philippines21:50,619,112341,003
Norway21:2,571,14395,402
Denmark21:2,822,35876,882
Malaysia21:14,747,112316,340
Dominica21:37,946685
Cayman Islands21:31,9461,715
Japan21:63,922,14662,827
Brazil21:107,037,1661,031,150
Hong Kong21:3,667,74211,574
Indonesia11:132,249,194811,426
Afghanistan11:32,153,18360,828
Azerbaijan11:9,649,12247,873
Bahrain11:1,348,60810,432
Gibraltar11:33,9541,660
Guernsey11:64,4392,137
Tanzania11:52,941,613123,716
Taiwan11:23,444,74693,622
Bosnia and Herzegovina11:3,536,40219,532
Iraq11:35,021,65431,813
Italy11:61,156,688199,583
Slovakia11:5,336,450140,422
Serbia11:7,144,94838,459
Jersey11:99,2026,620
Luxembourg11:580,54215,155
Romania11:20,077,87089,414
Macau11:601,6301,582
Mexico11:124,126,205103,776
Papua New Guinea11:8,153,717181,784
PlaceIncidenceFrequencyRank in Area
Ireland1,2891:3,437628
PlaceIncidenceFrequencyRank in Area
England241:1,015,64040,589
Wales21:784,20816,349
Scotland11:3,743,21632,299
PlaceIncidenceFrequencyRank in Area
United States841:597,84140,179

O'Mahony Surname Meaning

From Where Does The Surname Originate? meaning and history

(Celtic) the Irish O’Mathghamhna = Descendant of Mathghamhuin, i.e. the Bear.

Surnames of the United Kingdom (1912) by Henry Harrison

Ó Mathghamhna A well known sept of west Munster where people of the name are still mainly found. Bibl; IF 218; Map Cork; Plate XX

A Guide to Irish Names (1964) by Edward MacLysaght

The O'Mahonys of Desmond are named from Mahon, son of Kian, king of Desmond, who fell at Clontarf in 1014. O'Donovan. "The O'Mahonys were powerful chieftains in Munster, and had extensive estates along the sea-coast of Cork and Kerry. Opposite Horse Island, off the former county, was their castle of Rosbrin, boldly erected on a rock over the sea; and its proprietor, availing himself of the natural advantage it possessed, led a life of such successful piracy that Sir George Carew, when lord president, was obliged to destroy it." D'Alton.

Patronymica Britannica (1860) by Mark Antony Lower

O'MAHONY: The descendant of Mahon, which signifies a bear.

Ludus Patronymicus (1868) by Richard Stephen Charnock

O'Mahony Last Name Facts

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

O'Mahony is found most frequently in Ireland. It may also be found as a variant:. Click here for further possible spellings of this surname.

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

This surname is the 39,511th most frequently used last name globally, borne by approximately 1 in 548,513 people. The last name is primarily found in Europe, where 93 percent of O'Mahony reside; 91 percent reside in Northern Europe and 91 percent reside in British Isles.

This last name is most numerous in Ireland, where it is borne by 9,860 people, or 1 in 478. In Ireland O'Mahony is primarily concentrated in: Munster, where 80 percent are found, Leinster, where 18 percent are found and Connaught, where 2 percent are found. Besides Ireland O'Mahony exists in 55 countries. It also occurs in England, where 16 percent are found and Australia, where 4 percent are found.

O'Mahony Family Population Trend historical fluctuation

The frequency of O'Mahony has changed over time. In Ireland the number of people bearing the O'Mahony surname grew 765 percent between 1901 and 2014; in England it grew 8,583 percent between 1881 and 2014; in The United States it grew 379 percent between 1880 and 2014; in Scotland it grew 6,700 percent between 1881 and 2014 and in Wales it grew 3,150 percent between 1881 and 2014.

O'Mahony Last Name Statistics demography

The religious adherence of those carrying the O'Mahony surname is predominantly Catholic (99%) in Ireland.

The amount O'Mahony earn in different countries varies greatly. In United States they earn 124.66% more than the national average, earning $96,938 USD per year and in Canada they earn 27.74% more than the national average, earning $63,465 CAD per year.

Phonetically Similar Names

SurnameSimilarityWorldwide IncidencePrevalency
O'Mahoney943,674/
O'Mahonny942/
Omahony931,537/
O'Mayhoney891/
Omahoney88724/
Omahonoy883/
O'Mohony882/
Omaahony881/
O'Mahoni881/
O'Mohoney821/
O'Mohany750/
Omaona711/
Omayone67217/
Omoanyi674/
Osmaone671/
Omayona671/

Search for Another Surname

O'Mahony Reference & Research

O'Mahony FamilyTree DNA Group - A group collating DNA test results for those who bear the surname, includes results of DNA tests and discussions.

O'Mahony FamilyTree DNA Project - A description of a group researching the paternal lines of men who bear the surname with the help of DNA analysis.

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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'Mahony
  • 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