Reigned over North Wales and Denbarth; and being afterwards converted to Christianity, reigned over them in peace and wisdom for fifteen years. Aeddan had at least two sons, Gwaethstello (Lord of Gwent) who had issue Mervick, Lord of Gwent; who had issue Morvydd, dau. and heir who married Gronoe ap Ednivet Vaughan, Baron of Brynvengle, Chief counsellor to Llewellyn ap Iorwerth, the Great, 1194-1240. Gronoe Vaughan was ancestor to Owen Tudor, who married the widow of Henry V. John of Gaunt was buried in the chapel of Grosmont Castle; and Aeddan, a powerful Chieftain of Gwent during the reign of Henry II.