Roger, a gentleman of wealth, rank, and high respectability was a special friend of her father's, and would later be his companion in arms at the Battle of Agincourt.
Alys ferch Owain Glyndŵr | Gwladys Épangue | Dafydd Iwan | Dafydd ap Gwilym | Llywelyn ap Dafydd | Gwladys ferch Dafydd Gam | Gwladys | David Pugh and Dafydd Rogers | Dafydd Williams | Dafydd Wigley | Dafydd Goch | Dafydd Gam | Dafydd Elis-Thomas | Dafydd Davis | Dafydd ab Owain Gwynedd | Dafydd ab Hugh | Dafydd ab Edmwnd |
He was the son of William ap Thomas of Raglan Castle and Gwladys ferch Dafydd Gam, and the brother of William Herbert, Earl of Pembroke.