NameIago AP IDWAL FOEL King Of Gwynedd, 28G Grandfather
Web Notes notes for Iago AP IDWAL FOEL King Of Gwynedd
From the book History of the Family of Mostyn of Mostyn by Mostyn and T.A. Glenn, London, 1925, page 6:
Iago (as Iacob) is named as one of the witnesses to a charter dated at Bath, Whitsuntide, 966, (Kemble, Codex Dipl. 519) and in one before 971 (as Iacobus) (Eng. Com., Palgrave, II, p. ccliii). He was King of Gwynedd.