1 April - John Josiah Guest is elected the first chairman of the Merthyr "board of guardians", formed with the view of obtaining an act of Parliament for the incorporation of Merthyr.
It then comes to a roundabout by the Hoover Plant and The Premier Inn where there are links to Aberfan and Troedyrhiw via the A4054, Merthyr Town Centre via the A4054 (the old A470).
On the 23 May 1877, Williams met his future wife Rose Harriette, eldest daughter of Robert Thompson Crawshay the ironmaster of Cyfarthfa Castle in Merthyr.
Having been born in Bedlinog, South Wales, Watkins played local football for Merthyr and Bedlinog before joining Wolverhampton Wanderers as an amateur wartime player in 1939.
The Merthyr Tydfil club can be seen in the 2000 film House!, where it doubles as the newly opened (by Keith Chegwin) and fictional Mega Bingo building.
On 30 June 2007, Donny Osmond, who traces his family history to Merthyr Tydfil, performed the 'Donny Comes Home' concert in the park grounds.
After his football career had ended Trailor returned to his home town of Merthyr Tydfil where he was employed at the town's Hoover plant.
Another side of his many faceted personality is that of professional actor, appearing as Captain Cat in "Under Milk Wood" and as Blind Dick Llewellyn in the BBC television production of Jack Jones's "Off to Philadelphia in the Morning" (the life story of the Merthyr Tydfil composer Joseph Parry).
Edgar Rees Jones (1878–1962), British Member of Parliament for Merthyr Tydfil, 1910–1918, and Merthyr, 1918–1922
At the 1868 General Election, Merthyr Tydfil became a two-member constituency but Bruce was defeated by Henry Richard and Richard Fothergill.
In 2005, he beat Owen Money, Richard Trevithick, Joseph Parry and Lady Charlotte Guest to be named "Greatest Citizen of Merthyr Tydfil", in a public vote competition run by Cyfarthfa Castle and Museum as part of the centenary celebrations to mark Merthyr’s incorporation as a county borough in 1905
Before his first book was published in 1938, Davies' work appeared in the Western Mail, the Merthyr Express, the Daily Herald, the Left Review and Comment (a weekly periodical of poetry, criticism and short stories, edited by Victor Neuburg and Sheila Macleod).
In the first series of Building on the Past, Parry visited the towns of Newport, Newtown, Blaenavon, Carmarthen, Criccieth and Machynlleth, and in the second series Anglesey, Swansea, Presteigne, Lampeter, Merthyr, and Haverfordwest, relating the history of each town to its architecture.
He has played for numerous clubs around Wales most notably Cardiff RFC, Pontypool, Abertillery, Tredegar, Merthyr and Bridgend.
Santo Santoro served as the member for Merthyr and its successor seat, Clayfield, for 12 years until losing it at the 2001 election.
Unlike the "simple," "charming" Gothic synagogues that once graced Llanelli and Pontypridd, however, the synagogue of Merthyr Tydfil is a "Disneyland" fantasy of a building that architectural historian Sharman Kadish calls a "double-turreted Gothic folly" of a building.
Merthyr Tydfil was a miners’ seat, and power within the local Labour Party lay within the locally dominant trade union, the South Wales Miners' Federation.
Mynydd Merthyr is the name given to the broad ridge of high ground between Taff Vale (Welsh Cwm Taf) and the Cwm Cynon in the Valleys region of South Wales.
In 2007, Parthian Books published Dial M for Merthyr, Trezise's account of her time spent on tour with Welsh rock band Midasuno.
Evans became a circuit judge in 1992, serving as resident judge for the Merthyr Tydfil Crown Court from 1994 to 1998 and resident judge for the Swansea Crown Court from 1998 to 1999.
He was appointed a CBE in 2002, and in June 2004 he was given a life peerage, as Baron Rowlands, of Merthyr Tydfil and of Rhymney in the County of Mid-Glamorgan.
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Rowlands served as Member of Parliament for Merthyr Tydfil until the constituency boundaries were redrawn and renamed for the 1983 general election, when he was returned for the new Merthyr Tydfil and Rhymney constituency.
William Crawshay II (1788–1867), his son, owner of Cyfarthfa Ironworks in Merthyr Tydfil
YFJ also marched from Merthyr Tydfil to Cardiff starting 4 August 2011 to highlight that Merthyr Tydfil had the fourth highest level of youth unemployment in Britain.