Gwerful was the daughter of Ieuan Goch ap Moriddig but her mother is unknown. The date and place of her birth have not been found.
Her husband was Einion ap Gwallter. They were married, but the date and place have not been found. Their four known children were NN verch Einion (?-?), Tangwystl verch Einion (?-?), Philip ap Einion (?-?) and Maredudd ap Einion (?-?).