Cadvan married twice, first to Maggie Jones, daughter of Hugh Jones, Ty'n y pwll, and Dinas Mawddwy, on 23 August 1876, in the Independent Chapel. His second wife was Mary Ada Evans, daughter of Meschach Evans, Manchester House,
Leeswood, whom he married on 15 August 1882 in the Wesleyan Chapel of
Mold. John Cadvan Davies died at
Oswestry on 12 October 1923. ==Notes==