Gruffudd ap Llywelyn ap Iorwerth

Gruffudd ap Llywelyn ap Iorwerth (c. 1200 – 1 March 1244) was the son of Llywelyn the Great, he was illegitimate, however in Welsh law he was allowed to become Prince, however Llywelyn wanted Dafydd ap Llywelyn to become the next prince, he died in 1244 whilst attempting to escape the Tower of London, after being imprisoned by King John as a hostage.
Birth.
He was probably born around the year 1200, his father Llywelyn the Great is considered one of the greatest Welsh Princes, Gruffudd was illegitimate, and was taken as a hostage, but released in 1215.