Gwenllian Unknown Princess Powys Fadog was born to Ithel Fychan Unknown.
Madog ap Gruffydd Fychan "Crypl" Mathrafal Prince Powys Fadog and Gwenllian Unknown Princess Powys Fadog were married. She by marriage Princess Powys Fadog. He the son of Gruffydd Fychan Mathrafal Prince Powys Fadog.
[her son] Gruffydd Mathrafal was born to Madog ap Gruffydd Fychan "Crypl" Mathrafal Prince Powys Fadog and Gwenllian Unknown Princess Powys Fadog.