Thomas' father was Sir Thomas Boyd and his mother was <Unknown>. His paternal grandparents were Sir Robert Boyd and <Unknown>. He had two brothers and a sister, named William, Robert and Margaret. He died in 1410.1
General Notes
Notes from http://home.austarnet.com.au/dfgoonan/BOYDpg.htm
Sir Thomas BOYD d. 1410 children of Sir Thomas BOYD: Sir Thomas; William; Robert