William ap Thomas Welsh noble (1400–1446) Parents Maud Morley Thomas ap Gwyllym Children John Gwilim Herbert Elizabeth Herbert William Herbert, 1st Earl of Pembroke Margred Herbert, of Raglan Margaret Herbert Richard Herbert Siblings Mawd ferch Thomas ap Gwilym ap Jenkin Dydvil|Maud ferch Thomas ap Gwilym ap Jenkin Hywel ap Thomas of Perthyr Philip ap Thomas of Abergavenny NN ferch Thomas ap Gwilym Ieuan ap Thomas ap Gwilym ap Jenkin Tudful ferch Thomas ap Jenkin ab Adam Partners Margaret ap Griffith Gwladys ferch Dafydd Gam Elizabeth Bluet
