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| Grennan | fairly numerous: Offaly, Wexford, Mayo. Ir. Ó Grianáin, grian, sun, was a feminine name in Irish legend. However, the name is of Norman origin in Leinster. MIF. |
| Grennon | rare: Dublin. See Grennan. |
| Ó Grianáin | Greenan, Grennan: cuíosach líonmhar: an Dún, Muineachán, Cabhán: líon beag: Maigh Eo, mar a raibh siad sean-bhunaithe. Is cosúil gur clann eile a bhí in Ulaidh. Tá an log-ainm Ballygrennan coitinn i Luimneach ach is Baile Uí Dhroighneáin atá ann. Bhí ainm baineann, Grian, ann sa luath-aois - b'fhéidir go bhfuil baint éigin leis. |
Parishes where a Grenan and a second surname married each other.
This list shows total Grenan Roman Catholic marriages by county.
Click on the county to see detail.