Dafydd Nanconwy was a 17th century Welsh poet. It is thought his father was the poet Tomas Dafydd ap Ieuan ap Rhys ap Gronnw ap Meyrick ap Llewelyn ap Richard ap Dafydd of Pwll-y-Crochan in ‘Llechwedd Isaf’ (i.e. Arllechwedd Isaf), Caernarfonshire. His work includes a cywydd style poem written to Captain William Myddelton of Gwaenynog (who died in 1637).
Amongst his contemporaries were Harri Howel and Huw Machno. 
^ Williams, Griffith John. “Dafydd Nanconwy”. Dictionary of Welsh Biography. National Library of Wales. Retrieved 25 November 2016.
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