Dilgan | Very rare: Clare. Ir. Ó Duibhleacháin (according to Woulfe), making it cognate with Dullaghan, q.v. SI. |
Dolaghan | rare: Breifne, Belfast. Ir. Ó Dallacháin, probably from dall, blind. Occurs also as Dollaghan, Dullaghan. |
Dollaghan | rare: Breifne. See Dolaghan. |
Dullaghan | fairly rare: Louth etc. Ir. Ó Dubhlacháin. Also as Dillaghan. |
Ó Dubhlacháin | Dullaghan, Dollaghan: cuíosach annamh: Cabhán, Lú & rl. Clann a bhain le Oirghialla, tráth. Féach Ó Duibhleacháin. SI. |
Parishes where Dulahan and a second surname are found together
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