Dafydd ap Gruffydd (c. 1600) was a Welsh poet from the Caer Drewyn area. He is known to have composed diadactic verses, such as 'Karol o siample da i wyr ag i wragedd i fyw yn gyttyn ag i ddysgv i plant', but little is known about him generally.
References
Dafydd ap Gruffydd (poet) Wikipedia(Text) CC BY-SA