This Sir Thomas was, according the best authorities, brother to Sir Robert Holland, Knt., who is said to have been the father of Robert Lord Holland, the progenitor of the Dukes of Exeter and Surrey. (See, in the Heralds' College, -- Prothero MSS.-- The Fifteen Tribes of N. Wales, p. 164; Advenae of Carnarvon, p. 74; Vincent MS. 135, p. 85; in the Brit. Mus. Harl. MSS., 1468, p. 50; 1500, p. 46)
The difficulties which beset the account of this Sir Thomas Holland given by Pennant (vol. ii, p. 730), and partly countenanced by the pedigrees in Lewis Dwnn, are pointed out by Sir S. Meyrick in his notes to the latter, and by Randall Holme in Harl. MS. 1971.