O'Toole family

O'Toole
Ó Tuathail
O'Toole coat of arms
Parent houseUí Dúnlainge
CountryCounty Wicklow
FounderTuathal mac Augaire, King of Leinster
Historic seatPowerscourt Castle, Wicklow
Castleruddery, Wicklow
Carnew Castle, Wicklow
Threecastles Castle, Wicklow

The O'Toole (Irish: Ó Tuathail) family of County Wicklow, formerly one of the leading clans of Leinster, descended from Tuathal mac Augaire, King of Leinster (died 958), of the Uí Muiredaig branch of the Uí Dúnlainge dynasty.

Not all people with this surname are necessarily related to this specific family, there being several other Irish families of the name.