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| Heanen | rare: Down. Variant of Heenan, q.v. |
| Heenan | fairly numerous: Down etc. also Tipperary-Waterford etc. Ir. Ó h-Éanáin, a sept of North Tipperary. Woulfe regards it as synonym of Ó h-Eidhneáin. The root may be in the first name Éanna - the connection with eidhean (ivy) is tenuous. SI & SGG. |
| Ó h-Éanáin | Heenan: cuíosach annamh: Tiobraid Árann, an Dún & rl. Clann a bhain le Ros Cré riamh - b'fhéidir go raibh clann eile in Ultaibh. Deir de Bhulbh go bhfuil sé gaolmhar le Ó h-Eidhneáin (Hynan), q.v. |
Parishes where Heanon and a second surname are both baptised.