Gwilym ap Llywelyn

Parents

• Mawd verch Ieuan ap Rhys ab Ifor Gôch of Glangwy
• Llywelyn ap Hywel Fychan ap Hywel ab Einion Sais

Children

Siblings

• Elen ferch Llywelyn ap Hywel Fychan
• Thomas ap Llywelyn ap Hywel Fychan ap Hywel ab Einion Sais
• Jenkin ap Llywelyn ap Hywel Fychan
• Morgan ap Llywelyn ap Hywel Fychan ap Hywel of Brecon
• Jonet ferch Llywelyn ap Hywel Fychan ap Hywel
• Hywel ap Llywelyn ap Hywel Fychan
• Dafydd Gam