Tangwysti

  General Notes:

http://www.ancientwalesstudies.org/id55.html:
Tangwystl was the daughter of Dyfnwal ap Alser ap Tudwal Gloff[5]; since her father died in the lifetime of Tudor Trevor, she would inherit nothing from either man under Welsh law. And Tudor Trevor did not hold any land south of Oswestry anyway[6]. Elystan Glodrydd was born near 985/990 long after the death of King Athelstan, and likely died nearer 1050/1060.

Tangwysti married GRONO (GRONWY), son of TUDOR TREVOR and Angharad.