Dafydd ap Llewelyn

Dafydd ap Llewelyn, in the Welsh language, means "David, son of Llewelyn", and there have been several notable people known by this patronymic, including


 * Dafydd ap Llywelyn (1215–1246), Prince of Gwynedd and first Prince of Wales
 * Dafydd Gam (1380–1415), Welsh soldier and nobleman who died at the Battle of Agincourt