Goronwy ap Tudur Hen, also known as Goronwy ap Tudur or Goronwy Fychan, was a Welsh aristocrat and Lord of Penmynydd. He was a member of the Tudor family of Penmynydd, Anglesey, North Wales, and a direct ancestor of Owen Tudor and thereby the Royal House of Tudor. He was a soldier for the English crown, who fought in the First War of Scottish Independence, including in the English invasion which led to the Battle of Bannockburn. He remained loyal to King Edward II of England until the king's death, and was both a yeoman and forester of Snowdon. After his death in 1331, his body was interred in Llanfaes Friary, near Bangor, Gwynedd.

The Tudors of Penmynydd were a noble and aristocratic family, connected with the village of Penmynydd in Anglesey, North Wales, who were very influential in Welsh politics. From this family arose Sir Owen Tudor and thereby the Tudor dynasty, that ruled the Kingdom of England from 1485 to 1603. The Tudor dynasty ended in the early 17th century with the death of Elizabeth I.