Evans was born in Fishguard, Pembrokeshire, in south Wales on 31 August 1875 and did not include his mother's maiden name in his surname until 1899, when he was 24 years old.
He was ordained deacon in St Paul's Cathedral in 1898 and then served as curate in various parishes, including Ealing, Cardiff, and English and Welsh Bicknor.
He was, from 1926 to 1932, vicar of Potterspury with Furtho and Yardley Gobion (1926–32), before his final appointment as rector of Wrabness from 1932 to 1957.
[1] He was a historian of early Britain, the Celtic church and Welsh law, although some of his theories were unorthodox.
He translated and studied many early historical sources, with his publications including Nennius's "History of the Britons" (1938) Coll Prydain (1950) and The Emergence of England and Wales (1956, 1959).