SOURCE-08180Research NeededProbable
Doyle, James E. (1886). The official baronage of England, showing the succession...
Full citation
Doyle, James E. (1886). The official baronage of England, showing the succession, dignities, and offices of every peer from 1066 to 1885. Cf. pp. 343-44. Available online via Internet Archive at: Theofficial baronage of England - Somerset: 1397 John de Beaufort I.