Sir William Killigrew (died 1622) of Hanworth, Middlesex, was a courtier to Queen Elizabeth I and to her successor King James I, whom he served as Groom of the Privy Chamber.[1] He served as a member of parliament at various times between 1571 and 1614 and was Chamberlain of the Exchequer between 1605 and 1608. Several of his descendants were also royal courtiers and many were buried in Westminster Abbey.