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| Bradley | Very numerous: widespread, especially Ulster and Leinster. Ir. Ó Brolacháin. An Ulster sept of note in Derry. It seems likely that some Bradleys are of English origin as the name is widespread there. SGG. |
| Brolly | fairly numerous: Derry etc. Ir. Ó Brolaigh, from personal name derived from brollach = breast. A sept of Derry where they still flourish. Rarely as Brawley. SI. |
| Ó Brolcháin | rare: Dublin etc. Ir.Lang. See Bradley. |
| Ó Brolcháin | Brollaghan, Bradley: an-líonmhar mar Bradley i dtuaisceart Uladh. Bhí baint acu le Doire le fada. Clann ionráiteach sa mheán-aois: Mael Íosa Ó Brolcháin (+1086) a chum "Deus meus adiuva me", iomann atá i bhfeidhm fós. Bhí craobh i gCorcaigh faoin mbréagriocht Bradley, ach is cosúil gur sloinne Sasanach Bradley i Cúige Laighean. IF. |
Parishes where Brodly and a second surname are both baptised.