Gwenllian ferch Gwilym ap Hywel Grach ap Gwilym ap Hywel (1361-1455) (1361–1455) Parents Elsbeth Walbyf Gwilym ap Hywel Grach ap Gwilym ap Hywel Children Morgan ap Dafydd Gam ap Llywelyn ap Hywel Fychan Gwladys ferch Dafydd Gam Siblings Ieuan ap Gwilym ap Hywel Grach ap Gwilym of Abercrai Trahaearn ap Gwilym ap Hywel Grach ap Gwilym of Crai Rhys ap Gwilym ap Hywel Grach ap Gwilym