Armagh: | 8 | Cavan: | 11 | Cork: | 7 | Donegal: | 5 |
Fermanagh: | 1 | Kilkenny: | 14 | Leitrim: | 13 | Limerick: | 2 |
Meath: | 9 | Monaghan: | 1 | Offaly: | 1 | Sligo: | 1 |
Tyrone: | 2 | Waterford: | 12 | Westmeath: | 1 |
Keogan | Quite numerous: Meath-Cavan etc. Ir. Mac Eochagáin (SI); Ó Ceogáin (SGA) so that it may sometimes be a variant Cogan. Woulfe says it is a variant of Mag Eochagáin, i.e. Geoghegan, q.v. |
Keoghan | Quite numerous: Waterford-Kilkenny, Midlands. Ir. Mac Eochagáin, dimin. of Eochaidh. Cognate with Keogan and Keohane. |
Keohan | rare: Waterford. Ir. Mac Eocháin, see Keohane. |
Keohane | numerous: mainly Cork. Ir. Mac Eocháin, dimin. of Eocha, a variant of Eochaidh, but in spoken language Ó Ceocháin. SI & SGG. |
Ó Ceocháin | Keohane: líonmhar: Corcaigh thiar: claochlú ar Mac Eocháin, q.v. |
Parishes where Keoghan and a second surname are found together
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