|Father of the House|
8 October 1952 – 8 October 1959
|Preceded by||Sir Hugh O'Neill|
|Succeeded by||Sir Winston Churchill|
|Member of Parliament |
15 November 1922 – 8 October 1959
|Preceded by||John Williams|
|Succeeded by||Ifor Davies|
David Rhys Grenfell
16 June 1881
Penyrheol, Swansea, Wales
|Died||21 November 1968 (aged 87)|
Beatrice May Morgan
Grenfell was born on 16 June 1881 at Penyrheol, Gorseinon, Swansea, one of ten children of William Grenfell (a native of Blaenavon, Monmouthshire) and his wife, Ann, Hopkins (of Aberavon). His grandfather, John Grenfell, settled in Blaenavon where he became a coal miner, having been born in Sancreed, Cornwall.
Grenfell was educated at Penyrheol Board Elementary School until 1893, when, at the age of 12, he was forced to start working as a coal miner underground himself. While working he attended night school to study mining, geology and mathematics; and in 1903 he went to Nova Scotia, where he worked with people of various nationalities, which help foster his love of learning languages. While in Canada he passed his Under Managers Certificate; and in 1905 he returned to Britain, where he obtained First-Class Managers qualifications. Grenfell taught at a number of evening classes himself from 1907 to 1911, and was named a miners' agent in 1916 for the Western Region of the South Wales Area of the Coalminer's Federation upon the death of his predecessor, William Morgan.
Grenfell continued to work underground until 1916, when he was appointed the miners agent for the Western Region of the South Wales Area. He became active in the local Labour Party in 1916; and in 1920 he was adopted prospective candidate for the Gower constituency. He was elected Member of Parliament (MP) in a by-election in 1922, and held the seat until 1959. He was made a Commander of the Order of the British Empire (CBE) in 1935.
"DR", as he was known, was a member of the Parliamentary Select Committee on Betting, a member of the Parliamentary Administration Committee, and served on the Forestry Commission and on the Royal Commission of Safety in Mines in 1936. He became chairman of the Franco/British Parliamentary Party, for which he was later invested with the Chevalier of the Legion of Honour. Grenfell strongly condemned the signing of the Molotov–Ribbentrop Pact, stating in October 1939: "I know what Russia has done. It has been a most despicable act. We say in this country that kicking a man when he is down is the act of a coward. Russia, stepped in and kicked Poland when she was prostrate and shook hands with the aggressor. There is no word for it. I do not know what Russia proposes to do in future, but I am sure it does not reduce the crime against Poland by one iota because they have been two aggressors instead of one." 
He acted as chairman of the Welsh Parliamentary Labour Party, and in Winston Churchill's coalition government during World War II he served as Secretary for Mines at the Board of Trade (1940–45), in which capacity he argued for the nationalization of the coal industry, and reiterated the call in his 1947 book, Coal.
From 1948 to 1951 Grenfell was Chairman of the Welsh Tourist Holiday Board; and while holding that post he saw Gower become the first area of Britain to be designated an Area of Outstanding Natural Beauty. In 1951 Grenfell was sworn of the Privy Council. In 1953 Grenfell became the first Labour politician to hold the title "Father of the House", as the longest continual serving Parliamentarian. This was despite Churchill being older and entering Parliament before him, as Churchill had broken his time as an MP.
Grenfell held office in many local bodies, and was made an Honorary Freeman of Swansea for his contribution to public service. A bust of him now stands in the Swansea Guildhall. He was succeeded as Member of Parliament for Gower by his former agent, County Councillor Ifor Davies of Gowerton, who continued to hold the Gower seat until his death in 1982. His brother, William John Grenfell, was for a number of years a member of Llwchwr Urban District Council, representing the Pontybrenin ward.
Grenfell resided at "Ardwyn", Carnglas Road, Sketty, Swansea. He died on 20 November 1968 aged 87, and is buried at Brynteg Cemetery, Gorseinon. His wife, Beatrice, who was a county magistrate, died in 1976, followed by their daughter Eileen (1907-1992).
- Swansea University, David Rhys Grenfell collection Archived 11 August 2011 at the Wayback Machine. Archives Wales.
- Profile, yba.llgc.org.uk; accessed 10 May 2014.
- Wacław Jędrzejewicz, Poland in the British Parliament, 1939-1945. Vol. 1, British guarantees to Poland to the Atlantic charter (March 1939-August 1941). (p. 302)
- Davies, John; Jenkins, Nigel (2008). The Welsh Academy Encyclopaedia of Wales. Cardiff: University of Wales Press. p. 334. ISBN 978-0-7083-1953-6.
- "The Father of the House" Archived 25 March 2009 at the Wayback Machine, House of Commons Information Office at parliament.uk; accessed 10 May 2014.
|Parliament of the United Kingdom|
| Member of Parliament for Gower
Sir Hugh O'Neill, Bt.
| Father of the House
|Trade union offices|
W. E. Morgan
| Agent for the Western District of the South Wales Miners' Federation
D. J. Williams
Walter Smith and William Straker
| Auditor of the Trades Union Congress
With: Samuel Lomax
Herbert Elvin and Samuel Lomax