Gruffydd ap Llywelyn Fawr, Welsh noble, son of Llywelyn the Great (b. 1200)
Gruffudd ap Llywelyn ap Iorwerth (c. 1196 – 1 March 1244) was the Welsh first-born son of Llywelyn the Great ("Llywelyn Fawr"). His mother Tangwystl (c. 1180/1185 – c. 1210) probably died in childbirth.