He resigned his whole estate to the King, from whom, on 12 January 1592,[nb 1] he obtained a new charter thereof, "erecting the same into a free Lordship and Barony, to be called the Lordship and Barony of Kilmarnock" to himself for life, with remainder to his son and heir apparent, Robert, Master of Boyd, in tail male, remainder to "heirs male," thereby excluding the heirs general.
Under this grant Thomas, not improbably, became Lord Boyd of Kilmarnock.
[2] Thomas Boyd married firstly, before 1568, when she was living, Margaret, 2nd daughter of Sir Matthew Campbell, of Loudoun, by Isabel, daughter of Sir John Drummond, of Innerpeffry.
He married secondly to Jane daughter of William Stockdale.
He married, lastly, to Elizabeth Wallace, who survived him.