Click on the red marker on the map below for a link to the FindMyPast transcript. (Free, registration required).
| Garrahan | rare: Roscommon-Longford. Ir. Mag Aracháin (perhaps arrachtach, monster-like). A family originating in Fermanagh and linked with Ó Faracháin (Farren). MIF & SGG. |
| Garrigan | Quite numerous: Dublin, Meath etc. Ir. Mac Geargáin; Ó Geargáin. See Gargan. |
| MacGarahan | Very rare: Tipperary. Ir. Mag Aracháin, derived, perhaps, from Farachán. See also Farren. |
Parishes where Garegan and a second surname are both baptised.