Denis ap Watkin ap Gwilym ap Dafydd Parents Watkyn Vaughan Children John (2) ap Morgan ap Jenkin ap Philip of Tredynog Siblings William Vaughan Sir Thomas Vaughan, of Bredwardine Margred (1) ferch Watkin Vaughan Margred (2) ferch Watkin Vaughan William Vaughan, of Rhydhelig