John married Mary (Margaret) Graham, Countess of Mentieth on 21 Nov 1348. Mary (daughter of John of Abercorn Graham, Earl of Menteith and Mary de Menteith, Countess of Menteith) was born before 1334; died in 1380; was buried in Inchmahome Priory, Perthshire. [Group Sheet] [Family Chart]
- 1352
