John Kennedy, 7th Earl of Cassilis

He succeeded to the titles of 9th Lord Kennedy and 7th Earl of Cassillis on 22 September 1668. He was one of the commission exercising the office of Treasurer of Scotland between 1689 and 1695. He was appointed Privy Counsellor of Scotland to King William II in 1689.^[2]

On his death, his titles went to his grandson, as his first son, Lord Kennedy, had predeceased him. Kennedy was a keen freemason, belonging to the Kilwinning Lodge.^[3]

On 26 December 1668, Lord Cassillis married Lady Susannah Hamilton (1632–1694), a daughter of James Hamilton, 1st Duke of Hamilton and the former Lady Margaret Feilding. They had three children:

• John Kennedy, Lord Kennedy (c. 1672–1700), who married Elizabeth Hutchinson, in 1697.^[4]
• Anne Kennedy (bef. 1679–1699), who married John Hamilton, 1st Earl of Ruglen, son of William Hamilton, Duke of Hamilton and Anne Hamilton, 3rd Duchess of Hamilton, after 1694.^[2]

On 27 February 1697 or 1698, Lord Cassillis was married to Mary Fox, the daughter of John Fox and Mary Weld. They had three children:^[2]

• Hon. James Kennedy (1701–1759)^[2]
• Lady Elizabeth Kennedy (b. 1701)^[2]
• Lady Mary Kennedy (b. 1701)^[2]

Lord Cassillis died on 23 July 1701 and was succeeded in his titles and estates by his grandson, John.^[2]

Through his eldest son, he was a grandfather of John Kennedy who became the 8th Earl of Cassillis.^[4] On the death of his grandson, the 8th Earl, without male issue, a competition arose, both for the estates and for the title of Earl of Cassillis, between William, Earl of March and Ruglen, heir general, and Sir Thomas Kennedy of Culzean, 4th Baronet, the heir male. The Court of Session found the right to the estates to be in the latter, 29 February 1760; and the same was found with regard to the title on a reference to the House of Lords, 27 January 1762.^[4]