Thomas was born in 1320 in Kilmarnock, Renfrew, Scotland.1 Thomas' father was Sir Robert Boyd and his mother was <Unknown>. His paternal grandparents were Robert Boyd and <Unknown>. He had two brothers named Alan and James. He was the oldest of the three children. He died at the age of 45 in 1365.1
General Notes
Sir Thomas BOYD of Kilmarnock b. C 1320 Kilmarnock, Renfrew, SCOTLAND; d. 1365 occ: 1st Lord Boyd of Kilmarnock Sir Thomas was taken prisoner at the Battle of Nevill's Cross in October 1346. children of Sir Thomas BOYD: Sir Thomas; Robert; unknown male
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Sir Thomas Boyd; 2nd feudal Baron of Kilmarnock; captured along with David II at Battle of Neville's Cross 1346. [Burke's Peerage]
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Notes from Sally Walmsley [Geniedash@bigpond.com]:
We know little about the first Sir Thomas Boyd, who succeeded to the Boyd estates. He evidently followed the Family's war-like traits, as he accompanied King David II to Durham, and was captured by the English at the battle of Neville's Cross in 1346. Either he or his son built Dean Castle, replacing the wooden fort atop the motte. Dean Castle was to be centre of the Kilmarnock Estates until the 1700's.
We do not know to whom Sir Thomas was married. He left three sons.