Career
Phillips took his bardic name from his birthplace, the village of Trefin in Pembrokeshire. He did not learn Welsh until his family moved to Cardiff when he was aged eleven. Whilst working as an apprentice tailor back in his native county, he mastered the art of cynghanedd.
After running his own tailoring business in Cardiff, he joined the Royal Garrison Artillery during World War I, and was seriously wounded.
In 1921 he took a teaching course at Caerleon, and taught at Pengam and Pontllanfraith.