Family of King of Gwynedd, Cadwallon II ap Cadfan and of Mercia, Helen?

Families

Unknown Partner King of Gwynedd, Cadwallon II ap Cadfan [I4153] ( * 591 + about 634 )
Unknown Partner of Mercia, Helen? [I4154] ( * 594 + ... )
  Children
Name Birth Date Death Date
King of Gwynedd, Cadwaladr ‘Fendigaid’ [I4152]615BET. 664 - 682

Narrative

[SUSANNA KEENE.FTW]

The vary late statement of Geoffrey of Monmouth that he married
a sister of King Penda of Mercia can probably be dismissed as
one of Geoffrey's numerous fabrications.