Dafydd Glyn Jones (born 1941) is a Welsh scholar and lexicographer, born in the village of Carmel, Gwynedd. He is a specialist in Middle Welsh prose, and his other interests include Welsh history, , and the life and work of Emrys ap Iwan. He was educated at Carmel Primary School and at Ysgol Dyffryn Nantlle, Penygroes, Gwynedd. He graduated from the University College of North Wales, Bangor and from Linacre College, Oxford.