Breen

The Irish name Breen has evolved from the Gaelic Mac Braoin or O Braoin. The surname Breen was first found in County Kilkenny (Irish: Cill Chainnigh), the former Kingdom of Osraige (Ossory), located in Southeastern Ireland in the province of Leinster, where the family is descended through the Heremon line and claim to be direct descendants of King Niall of the Nine Hostages.