John Kennedy, 6th Earl of Cassilis

John Kennedy, 6th Earl of Cassilis, PC was a Scottish peer, the grandson of Gilbert Kennedy, 4th Earl of Cassilis, and nephew of John Kennedy, 5th Earl of Cassilis. He succeeded to the titles of 8th Lord Kennedy and 6th Earl of Cassilis 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 1649-1651 and of an Extraordinary Lord of Session for Scotland June 1661-July 1662.