Surname Carthaigh (Carthaigh 
) , in the world, is a very rare family name. The family name Carthaigh is habitual in Ireland, where it is a rare surname, Belgium, where it is a very rare surname, and the United States, where it is an extremely rare surname. Very seldom, Carthaigh is the forename as well as the last name.
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| Carthaigh | Ireland, Belgium, United States |
| donall na buile mac carthaigh poet |
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| muireadhach ua carthaigh Irish poet |
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| fínghin mac carthaigh Irish king |
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| aodh ollbhar o carthaigh medieval Irish poet |
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| cruimthear mac carthaigh Medieval Gael |
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| feardana ua carthaigh Irish poet |
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| shane ó carthaigh Irish Gaelic football player, IE (b. 1994) |
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