Background
He was the son of Alexander Cunningham, 5th Earl of Glencairn and Janet Hamilton, daughter of James Hamilton, 1st Earl of Arran.
He was the son of Alexander Cunningham, 5th Earl of Glencairn and Janet Hamilton, daughter of James Hamilton, 1st Earl of Arran.
She was the daughter of Sir James Gordon of Lochinvar and Margaret Crichton. They had the following children:
James Cunningham, 7th Earl of Glencairn
John Cunningham, Laird of Ross
Lady Jean Cunningham who married George Haldane of Gleneagles (died 18 October 1574). Lady Katherine Cunningham who married Robert Fergusson, 9th Laird of Craigdarroch (died about 1613).
Lady Margaret Cunningham who married Sir Lachlan Mor Maclean of Duart (died 5 August 1598)
Lady Elizabeth Cunningham who married (1) in 1579 to James Crawford of Auchinames.
Elizabeth died before 7 September 1614. Lady Susannah Cunningham who married John Napier of Kilmahew
William died between 1576 and 24 February 1579/80.
William is a 14th great-grandfather of Prince William, Duke of Cambridge.