John Thomas Alderman was born 1852 at Coity,[1] and was a Welsh politician and trade unionist.
He was next elected as a checkweighman in Caerphilly, but decided to emigrate to the United States to find better-paid work.
[2] After a short period, Thomas returned to Wales, and in about 1887 was elected as full-time agent for the Garw Miners' Association.
Thomas continued as agent of its Garw Valley District, and also served on the union's executive committee.
A few house coal lodges disagreed, and installed Thomas as leader of a Lower Garw District, but this did not attract official recognition, and soon petered out.