Llywelyn the Last | Gruffydd ap Llywelyn | Llywelyn the Great | Llywelyn | Gwrgan Fawr | Fforest Fawr | Rhinog Fawr | Morgan Llywelyn | Madog ap Llywelyn | Llywelyn the Elder ap Maredudd ap Cynan ab Owain Gwynedd | Llywelyn Siôn | Llywelyn Bren | Llywelyn ap Dafydd | Llyn Arenig Fawr |
In 1275, after the death of his mother at Montargis Abbey, Amaury, by then a Papal Chaplain, accompanied his younger sister Eleanor de Montfort on a winter sea voyage to Wales and her new husband, Llywelyn ap Gruffydd (the grandson of Llywelyn Fawr).
# Gwenllian (?-1254) - married Maredudd ap Llywelyn of Meirionydd, son of Llywelyn Fawr.