John was a fellow of Merton College, Oxford and a canon of Windsor.
He is well remembered for having repaired the damage done to the cathedral during Owain Glyndŵr's reign.
He also erected a new bishop's throne and a reredos, parts of which survives.
He died in January or February 1496 and was buried in Llandaff Cathedral where his monumental effigy may still be seen.
This article about a United Kingdom bishop is a stub.