Sir John Bellenden was a Commissioner for the Treaty of Peace with Anna of Oldenburg, signed at Aberdeen 19 October 1556 confirmed by Mary Queen of Scots, 26 September 1557. He was present at the coronation of King James VI of Scotland in 1567.
Sir John Scot of Scotstarvet, writing in 1754, tells us that "Sir John made the conquests, and left his eldest son Sir Lewis a fair estate, viz. the barony of Broughton, Edinburgh, with the superiority of the Canongate and North Leith, having therein near two thousand vassals; the baronies of Auchnoul, Woodhouslie, Abbot's-grange, and many others. And to the eldest son of the third marriage he left the barony of Carlowrie, and Kilconquhar, Fife, and diverse lands about Brechin."
Sir John married thrice: (1) Marion (or Margaret) Scott, by whom he had three daughters. Two died young and the third, Marion (d.1604), married John Ramsay of the Dalhousie family. He remarried (2) by contract (signed by Queen Mary of Guise herself) dated 30 September 1554, Barbara, daughter of Sir Hugh Kennedy of Girvan Mains by his spouse Janet, daughter to John Stewart, 2nd Earl of Atholl. They had four sons and one daughter. He married lastly (3) 14 January 1565, Janet, daughter of Walter Seton of Touch. They had five sons and two daughters.
Of the children:
by his 2nd wife: