(1898 - 1966) was a minister with the Presbyterian Church of Wales who was ordained to a pastorate in Cardiganshire in 1925. From there he moved to Llanbadarn Fawr on the outskirts of Aberystwyth, and then in 1939 he moved to Caersalem Chapel, Ty Croes, on the outskirts of Ammanford, where he ministered for 36 years. In 1965 he ministered as Moderator of the South Wales Association of the Presbyterian Church of Wales.
Ellis wrote for the Welsh religious press between 1930 and his death in 1966. Among his books were:
- Living Echoes (1957).
- Doniau a danwyd (1957), a book examining a galaxy of Welsh pulpit giants.
- Lleisiau Ddoe a Heddiw (1963).
- Wrth Gofio'r Daith (1963), which is largely autobiographical.