He was the son of David de la Hay and a daughter of John Keith of Innerpeffer.
1353, and was a hostage for his ransom 1354; acted as Constable of Scotland at the coronation of Robert II.
1371, and next day took the oaths of homage to his Majesty, and swore to the Act of Settlement of the Crown, April 4.
1371; served heir to his grandfather, Sir John Keith of Innerpeffer, January 19- 1389-90; had a grant of Slaines, which Robert I. had given to the deceased Gilbert de Haya, 1376; and had all his lands erected into a free barony, June 30.
He married Elizabeth Stewart, a daughter of King Robert II of Scotland, before 7 November 1372.