In 920 Hywel "Dda aka Good" King Seisyllwg King Deheubarth [aged 40] succeeded King Seisyllwg. Elen Dyfed Queen Consort Seisyllwg Queen Consort Deheubarth by marriage Queen Consort Seisyllwg.
Hywel "Dda aka Good" King Seisyllwg King Deheubarth and Elen Dyfed Queen Consort Seisyllwg Queen Consort Deheubarth were married. She the daughter of Llywarch ap Hyfaidd King Dyfed. He the son of Cadell ap Rhodri King Seisyllwg.
Grandfather: Hyfaidd Dyfed
Father: Llywarch ap Hyfaidd King Dyfed