Seisyll ap Dyfnwal 
Seisyll was born in Abergavenny, Monmouthshire, England. Seisyll's father is Prince Dyfnwal ap Caradoc of Gwent and his mother is Joyce verch Hamlet. His paternal grandparents are Lord Caradoc ap Ynir of Gwent and Nesta verch Ryderick; his maternal grandfather is Duke Hamlet ap Draie of Balladon. He was an only child. He died on December 25th, 1177 in Abergavenny Castle, Monmouthshire, England.General Notes
1175 In this year Dafydd ab Owain seized through treachery Rhodri, his uterine brother, and harshly imprisoned him. And Dafydd then married the king's sister, Emma of Anjou, - because he thought he could hold his territory in peace thereby. But before the end of the year Rhodri escaped and drove his brother from Anglesey and across the Conway. And Rhys ap Gruffudd took with him to the king's council at Gloucester all the princes of Wales who had incurred the king's displeasure. All those returned with Rhys, having obtained peace, to their own lands.
And immediately after that Seisyll ap Dyfnwal was slain through treachery in the castle of Abergavenny by the lord of Brycheiniog. And along with him Geoffrey, his son, and the best men of Gwent were slain. And the French made for Seisyll's court; and after seizing Gwladus, his wife, they slew Cadwaladr, his son. And from that day there befell a pitiful massacre in Gwent. And from that time forth, after that treachery, none of the Welsh dared place trust in the French. [Chronicle of Ystrad Fflur]
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Seisyll was one of the princes that William de Braose, Lord of Bramber & Gower invited to Abergavenny Castle and then proceeded to murder.
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Ancestor Pedigree Chart
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*There are earlier generations for the ancestor(s) indicated. See their page(s) for details (click name)
- b.~ 1050
- b.~ 1075
- b.~ 1086 in Abergavenny, Monmouthshire, England
- b.~ 1200 in Wales
- b.1066 in Herefordshire, England
- b.ABT 1115/1126 in Abergavenny, Monmouthshire, England d.25 Dec 1177 in Abergavenny Castle, Monmouthshire, England
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They had a son named Cadwaladr.
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Children
Cadwaladr ap Seisyll
Cadwaladr was born in 1166 in Castell Arnallt, Llanofer, Monmouthshire, England.
They had a daughter named Gwladus.
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