John Williams (bardic name: Ab Ithel) (7 April 1811[1]–27 August 1862), was an antiquary and Anglican priest. Born in Llangynhafal, Denbighshire Wales in 1811, he graduated from Jesus College, Oxford in 1835 to become the Anglican curate of Llanfor, Merionethshire, where he married Elizabeth Lloyd Williams. In 1843 he became perpetual curate of Nercwys, Flintshire, and rector of Llanymawddwy, Merionethshire, in 1849.