Dafydd was the son of unknown parents. The date and place of his birth have not been found.
His wife was Margred verch Rhydderch. They were married, but the date and place have not been found. They had no known children.
Note 1
son of Llewelyn ap DAFYDD (son of Dafydd ap IEUAN FYCHAN & Dyddgu verch GRUFFUDD HIR