Dwnn also notes Llewelyn's grandsons "Llywelyn, Tomas [and] Morgan meibion [sons of] Gwilim ap Llewelyn ap Gruffydd vachan ap Dafydd vongam ap David ap Meurig goch" as holding Mallaen in the parish of Caeo, and traces the family back to Selyf, King of Dyfed through the lords of Caeo and Cilycwm.
Dwnn also highlights Llewelyn's grandsons "Llywelyn, Tomas [and] Morgan meibion [sons of] Gwilim ap Llewelyn ap Gruffydd vachan ap Dafydd vongam ap David ap Meurig goch" as the ones who held Mallaen in the parish of Caeo, and he tracks the family's ancestry back to Selyf, King of Dyfed through the Caeo and Cilycwm nobility.