Gruffudd is known to have had only one son, Hywel ap Gruffudd ap Cynan ab Owain Gwynedd, who is not known to have had any children of his own and died in 1216.
Gruffudd is recognized to have had just one son, Hywel ap Gruffudd ap Cynan ab Owain Gwynedd, who is not known to have any offspring and died in 1216.