Tangwystl verch Iago

Tangwystl verch was born about 1020 in Gwynedd, Wales.  Tangwystl verch's father was Iago III ap Idwal King of Gwynedd and her mother is Avendreg Of Powys. She had a brother and a sister, named Cynan ap and Crisli verch.  She was the youngest of the three children.  She died after 1075.