The Ui Muireadaigh (O'Tooles), were based in southern and south-east Kildare, around Moone, East and West Narragh and Kilcullen.  They lost land to Baron Walter de Riddlesford, following the Anglo-Norman invasion, and settled in Wicklow.  O'Toole comes from Tuathal, meaning ruler of the people. The name originated with Tuathal, a King of Leinster who died c. 960. While the name does occur in other parts of Ireland the majority of O’Tooles/Tooles are descended from the Co. Kildare family.