In 1938 he was appointed lecturer, and later Senior Lecturer, in Hebrew, at his old college where he remained until his retirement in 1977. After his marriage with Menna Davies, the daughter of Revd George and Mrs Marianne Davies, Bryn Bowydd, Blaenau Ffestiniog in 1940, the couple made their home in Bangor and Menai Bridge. They had two children, Keinion and Marian. Ap Thomas spent short periods away from Bangor - several times as visiting lecturer in Toronto University and a year carrying out archaeological work in Canaan.
Over the years Ap Thomas published articles and studies regularly in scholarly journals. His major contribution was the translations that he provided of works by Otto Eissfeldt, Martin Noth (The Laws in the Pentateuch and other studies, 1961), but his greatest achievement was his translation from the Norwegian of Sigmund Mowinckel's great pioneering work, The Psalms in Israel's Worship (2 vols, 1962, and 2004). He published A primer of Old Testament text criticism (1947, revised ed. 1961) and with Gwilym H. Jones, Gramadeg Hebraeg y Beibl (1976). He was the editor of the series Beibl a Chrefydd published by the University of Wales Press, 1976-1990. He was the energetic and enthusiastic secretary of the Society for Old Testament Study from 1961 to 1972 and President in 1974. A Festschrift edited by Gwilym H. Jones as volume 2 of Efrydiau Beiblaidd Bangor was presented to him in 1977.
He preached regularly on Sundays and served as Lay Minister of Hirael chapel (Welsh Independents) Bangor from 1944 to 1951. He was secretary of Coleg Bala-Bangor from 1947 to 1978. He was President of the Union of Welsh Independents in 1979; his address from the chair was Yr Hen Destament Newydd (The New Old Testament). He served on the Old Testament translation panel of the New Welsh Bible and was its chairman for a time.
He was an accomplished tennis player and skier in his student days, and also a very competent handiman, able to work with technical equipment and to service his own car.
Dafydd ap Thomas died 19 May 2011 and his ashes were buried in his wife's grave (she died in August 2004) in Blaenau Ffestiniog.
Reverend Gwilym Henry Jones, M.A., Ph.D., D.D., Bangor / Menai Bridge
Published date: 2013