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| Carlin | numerous: W Ulster. Ir. Ó Cairealláin. Chiefs of Clondermot in Derry. IF. |
| Kerlin | Quite numerous: Derry-Tyrone etc. Ir. Ó Coirealláin (SGA & SGG); Ó Cairealláin (SI). See Carleton and Carolan. |
Parishes where a Kerlin and a second surname married each other.