*Meddefus verch Owain
born about 1163 Cyfeiliog, Montgomeryshire, Wales

father:
*Owain "Cyfeiliog" ap Gruffudd
born about 1117 Montgomeryshire, Wales
died 1197

mother:
*Gwenllian I verch Owain
born about 1124 Caernarvonshire, Wales

siblings:
*Gwenwynwyn ap Owain born about 1151 Montgomeryshire, Wales died 1216

spouse:
*Gronwy ap Einion
born about 1185 Cyfeiliog, Montgomeryshire, Wales

children:
*Iorwerth ap Gronwy
born Cyfeiliog, Montgomeryshire, Wales
died after 1278

biographical and/or anecdotal:

notes or source:
LDS
research of S. E. Oman Salt Lake City