Illegitimate children included Sir Patrick Hamilton of Kincavil, father of Master Patrick Hamilton, burnt for heresy in 1528 and a Protestant martyr. Lord Hamilton also had a daughter who married Sir John MacFarlane, 11th chief of Clan MacFarlane. John Hamilton of Broomhill (d. c. 1550), another illegitimate child of James, 1st Lord Hamilton, was by Janet Calderwood. In 1512 John's birth was legitimised. His grandson, James Hamilton, notably served as Sheriff of Perthshire, and his descendants became the Lords Belhaven and Stenton. Another illegitimate child by Janet Calderwood was David Hamilton, Bishop of Argyll and commendator of Dryburgh Abbey.