In 1926, he met his future wife, Huana Rees, at the National Eisteddfod of Wales.
Kate Roberts wrote Traed mewn cyffion (Feet in Chains) which was awarded a prize at the National Eisteddford in Neath in 1934.
Roberts won the prize jointly with Grace Wynne Griffith and her novel Creigiau Milgwyn.
[4] Y Treigladau a'u Cystrawen, published in 1952, is generally considered his most important academic work.
He died suddenly at home in Bishopston, Gower, and was buried at Coed Gwilym cemetery in Swansea.