| Henahan | Very rare: Dublin. Ir. Ó h-Éanacháin. See Heneghan. |
| Heneghan | numerous: Galway-Mayo. Ir. Ó h-Éanacháin, Ó h-Éineacháin, a branch of Uí Fiachrach in Mayo. Also anglicised Bird by pseudo-translation. MIF. |
| Henihan | fairly rare: Mayo-Galway, Limerick. See Heneghan. |
| Hennigan | fairly numerous: Galway-Mayo-Roscommon etc. Ir. Ó h-Éanacháin. See Heneghan. |
| Ó h-Éanacháin | Heneghan: líon beag: Maigh Eo, Gaillimh & rl. Féach Ó h-Éineacháin. |
| Ó h-Éanagáin | Hennigan: líon beag: Maigh Eo & rl. Leagan eile d'Ó h-Éanacháin agus craobh d'Uí Fiachrach i Maigh Eo. Uaireanna, deineadh Bird díobh. MIF. |
| Ó h-Eineacháin | Heneghan, Henahan: annamh: Luimneach & Ciarraí. Leagan Muimhneach, b'fhéidir, d'Ó h-Éanacháin, q.v. SGG. |
DEDs where Henihan and a second surname are found together
This list shows total 1901 Henihan households by county.
Click on the county to see detail.
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