Selyf ap Cynan (called Sarffgadau, "Battle-serpent"), a 7th-century king of Powys killed at the Battle of Chester
Selyf ap Cynan | Maredudd ap Cynan ab Owain Gwynedd | Llywelyn the Elder ap Maredudd ap Cynan ab Owain Gwynedd | Gruffudd ap Cynan |