John Ellis Caerwyn Williams FBA (17 January 1912 – 10 June 1999), was a Welsh scholar.
Caerwyn Williams was born in Gwauncaegurwen, Glamorgan, into a coal-mining family.
He studied at the University College of North Wales, Bangor, and graduated in Latin in 1933 and in Welsh in 1934.
Intending to become a minister in the Presbyterian Church of Wales he studied at the United Theological College, Aberystwyth, and graduated BD in 1944.
[1] In 1971 he delivered the British Academy's Sir John Rhŷs Memorial Lecture.