The first wife of Maelgwn Gwynedd was either Sanan ferch Cyngen or an unnamed daughter of Sawyl Benisel. The De Excidio Britanniae tells us he murdered his wife in order to marry the wife of his brother’s son. This suggests she was possibly a generation younger than him. It is proposed this lady was Gwallwen ferch Afallach, the mother of Rhun ap Maelgwn Gwynedd, according to ByA 28d.
Furthermore, it is proposed that another daughter of Afallach was Modron who appears in triad 70 as the mother of Owain and Morfudd, by Urien Rheged. The story of this is told in Pen. 147 as a ‘Washer at the Ford’ tale-type. It describes the incident to have occurred within Denbighshire, in the parish of Llanferres. This area is the location of Caerfallwch, that is the hill-fort of Afallach, now known as Moel-y-Gaer. It lies in a region intermediate between the kingdoms of Gwynedd and Rheged.
|Gen.||ByA 28d||Triad 70(ii)|