Cognomen Caoimh (Caoimh 
) , all over the world, is a very rare family name. The cognomen Caoimh is characteristic of Ireland, where it is a rare surname, and the United States, where it is an extremely rare surname. Also, Caoimh is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Caoimh | United States, Ireland, United Kingdom, Costa Rica |
| eoghan o caoimh Irish poet and scribe (b. 1656) |
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| cornelius o caoimh Irish bishop (b. 1670) |
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| pádraig ó caoimh Irish musician, IE (b. 1887) |
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| séamas ó caoimh (b. 1889) |
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| aindrias ó caoimh Irish judge, IE (b. 1950) |
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| seán ó caoimh Irish hurler and Gaelic footballer, born 1951, IE (b. 1951) |
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| pádraig ó caoimh Irish radio broadcaster, IE |
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