John Kennedy, 6th Earl of Cassilis

John Kennedy, 6th Earl of Cassillis, PC was a Scottish peer, the grandson of Gilbert Kennedy, 4th Earl of Cassillis, and nephew of John Kennedy, 5th Earl of Cassillis. He succeeded to the titles of 8th Lord Kennedy and 6th Earl of Cassillis on 25 July 1616. He was a non-sitting member of Cromwell's House of Lords, and was invested as a Privy Counsellor of Scotland on 13 February 1660/61. He held the office of Justice-general from 1649 to 1651 and of an Extraordinary Lord of Session for Scotland from June 1661 to July 1662.