Ласси
De Lacy was the younger son of Hugh de Lacy, Lord of Meath, a descendant of Walter de Lacy, who went to England after the Norman conquest. Around 1189, he was appointed Viceroy of Ireland, a position previously held by his father. He was replaced in 1190 by Guillaume le Petil. He was later reappointed to serve as viceroy from 1205 to 1210.