Agatha de Castile

"Pedigrees of Anglesey and Carnarvonshire Families" by John Edwards Griffith, 1914 ed., p. 217 Osborn Wyddel = AGATHA, d. of the King of Castile and niece to the Queen of Edward I. p. 279 Osborn Wyddel p. 394 = ... D. of ... of Cors y gedol, the ward of Llewelyn the Great circ. 1227.

Reference Sources

1) [http://penrose.org/getperson.php?personID=I19604&tree=penrose]

2) [http://fabpedigree.com/s025/f405162.htm]

Tie in on Geni

Her Mother: [Violante de Aragón, reina consorte de Castilla]

Her Father : [Alfonso X el Sabio, rey de Castilla y León]