Thomas Boyd; 3rd feudal Baron of Kilmarnock; pardoned for killing a personal enemy 1409; married Alice, daughter and heir of Hugo Gifford of Yester. [Burke's Peerage]
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Notes from Sally Walmsley [Geniedash@bigpond.com]:
Sir Thomas Boyd II was described in contemporary documents as 'Dominus de Kilmarnock'. He was married to the daughter of Sir John Gifford of Yester. He was pardoned in 1409 for slaying Neilson of Dalrymple, when he must have been a good age. Apart from this, he seems to have left no record. He was succeed by his son, the third Sir Thomas.
Robin Patterson's main file generally stops at about this date. Sally has lots more.