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| Conlan | fairly numerous: mainly Leinster. See Conlon. |
| Conlin | Very rare: scattered. See Conlon. |
| Conlon | Very numerous: Ulster, Connacht and generally. This name is an anglicisation of the following Irish: Ó Conalláin (Galway), Ó Coinghiolláin (Sligo), Ó Caoindealbháin in Munster. Other variants: Connellan, Kinlen, Quinlan, q.v. IF. |
Parishes where McConlan and a second surname are both baptised.