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|Beirne||numerous: Roscommon/Leitrim, E. Leinster. Ir. Ó Beirn, derived from Norse Bjorn. There were two N.Connacht septs of this name. In Leinster it is a synonym of Byrne, which is a totally different name, Ó Broin. IF & SGG.|
|Ó Beirn||Beirne, O'Beirne: líonmhar: Ros Comáin-Liatroim. Bhí clann i Ros Comáin agus ceann eile i Maigh Eo. Is ón ainm Lochlannach Bjorn an sloinne. Daoine den sloinne seo in oirthear Laighean, baineann siad le Ó Broin, clann difriúil. IF.|
|Ó Birn||O'Beirne: comhionann le Ó Beirn, q.v.|
|O'Beirne||numerous: Sligo-Roscommon-Leitrim-W Meath etc. Ir. Ó Beirn, from Norse first name Bjorn. A sept associated with the Mac Dermotts in Roscommon. IF.|
Parishes where a O'Beirne and a second surname married each other.
This list shows total O'Beirne Roman Catholic marriages by county and parish.
Click on the parish to go to the listing of parish records.