Name: Gwyn ap Collwyn
Change Date: 1 OCT 2010
The marriage of Gwyn ap Collwyn to an unnamed daughter of Gwerystan made Caradog ap Gwyn a first-cousin to Bleddyn ap Cynfyn ap Gwerystan.
The Brut entry for 1075 calls Trahaearn ap Caradog a cousin of Bleddyn, but their relationship was first-cousin-once-removed. Bartrum infers that Caradog ap Gwyn must have married a daughter of Gwerystan, but the chronology doesn't work. Nor would it explain how Cynwrig ap Rhiwallon ap Gwyn got his claim to share the kingship with Trahaearn; both men were great-grandsons of Nest ferch Cadell ap Brochwel ap Aeddan
Father: Collwyn ap Ednywain
- Rhiwallon ap Gwyn