Owain ap Gruffudd was brother to Llywelyn ap Gruffudd and Dafydd ap Gruffudd and, for a brief period in the late 1240s and early 1250s, ruler of part of the Kingdom of Gwynedd. Wikipedia
Born: Principality of Wales
Died: 1282
Great-grandparents: Iorwerth Drwyndwn, Marared ferch Madog, Gwyn ap Gruffudd, and more
Grandparents: Llywelyn ab Iorwerth, Caradog ap Thomas, and Efa ferch Gwyn
Parents: Gruffudd ap Llywelyn ap Iorwerth and Senana ferch Caradog
Nieces: Gwenllian of Wales and Catrin ferch Llywelyn ap Gruffudd
Siblings: Llywelyn ap Gruffudd