Ó Breisleáin
Ó Breisleáin was the surname of an Irish brehon family.
The Ó Breisleáin were natives of Fanad, County Donegal, and a branch of the family later became brehons to the Maguire of County Fermanagh
The surname is now anglicised as Breslin.
- M1495.18 ... O'Breslen, i.e. Owen, the son of Owen, son of Petrus, Chief Brehon to Maguire ..., died.
- M1524.23 O'Breslen (Owen Oge, the son of Owen), Ollav to Maguire in judicature, died.