|Galligan||numerous: Cavan, Midlands. Ir. ó Gealagáin (geal, bright, white). A sept of Uí Fiachrach, Sligo, who moved to Cavan where the name also became White. There is some confusion with Gilligan, q.v. MIF.|
|Ó Gealagáin||Galligan: líonmhar: Cabhán agus Lár na Tíre. Clann de chuid Uí Fiachrach as Sligeach; táid measctha le Ó Giollagáin anois. Deineadh White (geal) díobh, leis.|
Parishes where Galligan and a second surname are found together
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