Background
He was the son of Anglesey farmer John Cemlyn-Jones of Brynbella, Penmaenmawr.
He was the son of Anglesey farmer John Cemlyn-Jones of Brynbella, Penmaenmawr.
He was educated at Shrewsbury School. In 1914 after this task was completed and war broke out, he signed up to serve in the Royal Welch Fusiliers.
He was knighted in 1941. In 1912 he became Private Secretary to Anglesey"s Liberal Member of Parliament Sir Ellis Griffith, when he was appointed Under-Secretary of State for the Home Department. He supported Griffith in his task of steering the Welsh Disestablishment Bill through the House of Commons.
After the war was over he decided to start a legal career.
He was called to the bar in 1919. His first introduction to politics had come from working for his local Liberal Member of Parliament, Sir Ellis Griffith.
He got involved in civic affairs on Anglesey. In 1919 he was elected to Anglesey County Council.
He served on this body as a Councillor, until he was appointed to it as an Alderman in 1928.
He was Liberal candidate for the Unionist seat of South Croydon at the 1923 General Election. lieutenant was not a promising seat for the Liberals, whose candidate had polled 25.2% in 1922, finishing third. He was unable to advance the Liberal position;
He did not contest the 1924 General Election, when the South Croydon seat became a 2-way contest between Unionist and Labour.
He became Chairman of Anglesey County Council.
He was Liberal candidate for the Brecon & Radnor division at the 1929 General Election. This was a far better prospect as the Liberals had held the seat up until the 1924 General Election when they narrowly lost the seat to the Unionists in a close three-way battle, with Labour third.
He managed to increase the Liberal share of the vote, but Labour came through to take the seat from third place;
He did not stand for parliament again. He was Chairman of the Selection Committee of Anglesey County Council.
He was Vice-President of County Councils Association.