Family name Ruairc (Ruairc 
) , across the world, is a very rare cognomen. The family name Ruairc is characteristic of Northern Europe, particularly Ireland, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Ruairc | Ireland |
|
tighearnán ua ruairc Irish chieftain, IE (b. 1124) |
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| máire uí ruairc Irish politician, IE (b. 1937) |
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| colm ó ruairc Irish Gaelic football player, journalist and businessman, IE (b. 1957) |
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| ualgarg mór ó ruairc king of West Breifne, IE |
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| domnall ua ruairc King of Connacht |
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| art uallach ua ruairc Irish king |
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| áed ua ruairc Irish king |
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| bernadette ní ruairc Irish linguist, IE |
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| fergal ua ruairc King of Connaught |
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