William Abraham (14 June 1842 – 14 May 1922), universally known by his bardic name, Mabon, was a Welsh trade unionist and Liberal/Labour politician, and a member of parliament (MP) from 1885 to 1920.

Initially a pioneer of trade unionism, who fought to enshrine the principle of workers' representation against the opposition of the coal-owners, he was regarded in later life as a moderate voice believing that disputes should be solved through conciliation rather than industrial action.

Sailing to Valparaiso via Cape Horn, the ship had to avoid both storms and the Spanish Navy who were attempting to block trade with their rebel colonies in South America.

[4] Abraham left Waunarlwydd and travelled to the Rhondda, a rapidly growing mining area, and in 1877 joined the Cambrian Miners' Association, one of the few union wings of the A.A.M.

[4] Abraham continued speaking to the miners, and by April 1877, at a meeting in Llwynypia it was agreed that the union should be rebuilt and contributions should be made to a District Fund.

The Cambrian Miners' Association was reorganised and with Abraham as leader the membership grew from nothing in 1877 to 14,000 members in 1885, making it the largest of the seven district in the South Wales coalfield.

[6] In 1874 Abraham was briefly mentioned as a possible candidate in the Carmarthen Boroughs constituency in opposition to Arthur Stepney and Charles Nevill, although there was no real prospect of him standing.

[7] During a fiercely contrasted election, it was alleged, however, that Abraham was 'specially retained to influence and prejudice the colliers and other men against Mr Nevill.