John Owen's father, Evan Owen (1726-1819) and grandfather Owen Robert (fl. 1717-1750) were tenants at Gwernhefyn.

Selected publications

Thomas, W. J. (1894). Penillion telyn, Rhan 1. Caernarfon: Gwymni y Cyhoeddwys Cymreig.

Thomas, W. J. (1870). Cambrensia: A literary reading book for Welsh schools. London: Edward Arnold.

Thomas, W. J. (1907). The Welsh fairy book. London: Fisher Unwin.

Thomas, W. J. (1941). Some Forgotten Welshmen. Trans. Cymmrodorion (1941) 100-114