Sir William St Leger PC (Ire) (1586–1642) was an Anglo-Irish landowner, administrator and soldier, who began his military career in the Eighty Years' War against Habsburg Spain. He settled in Ireland in 1624, where he was MP for County Cork in two Irish parliaments and Lord President of Munster. During the Irish Rebellion of 1641, he played a leading part in suppressing the rising in Munster before dying in 1642. Personal details William St Leger was born in August 1586, probably in County Cork, eldest son of Sir Warham St Leger (1560–1600) and his wife Elizabeth Rothe, for whom it was her third marriage. His grandfather Anthony St Leger (1496–1559), had served as Lord Deputy of Ireland from 1540 to 1548, whereas his father held a number of administrative positions in Munster before he was killed during the Nine Years' War in 1600. While resident in Dordrecht during the Dutch War of Independence, he married Gertrude de Vries (1588–1624) in 1616; they had two children, William (1620-1644), killed fighting for the Royalists during the First English Civil War, and Elizabeth (1618–1685), who in 1635 married St Leger's ward Murrough O'Brien, 1st Earl of Inchiquin. With his second wife Gertrude Heywood, he had another two children, John (1637–1692) and Barbara. Career

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Sir William St Leger PC (Ire) (1586–1642) was an Anglo-Irish landowner, administrator and soldier, who began his military career in the Eighty Years' War against Habsburg Spain. He settled in Ireland in 1624, where he was MP for County Cork in two Irish parliaments and Lord President of Munster. During the Irish Rebellion of 1641, he played a leading part in suppressing the rising in Munster before dying in 1642.