William Henry Thomas was born in 1872 and lived with his family in Tanerdy, Abergwilly in the District of Carmarthen, Wales. Rev. Thomas received his degree in Divinity from New College in London, England. After graduation he became a Congregational Minister in Berkeley, Gloucestershire and Souther Petherton, Somersetshire in England. In 1905 he married Florence Nightingale Blackmore and they had three children -Doris Winifred in 1906, Ivor Charles Eaton in 1907 and Joyce Eleanor in 1922.
In 1914 Rev. W.H. Thomas accepted a call to minister at Queen's Road Congregational Church in St. John's Newfoundland. In 1922, he moved to Canada as a minister for the Broadview Congregational Church in Toronto, then shortly after ministered to Beulah Congregational Church (Ayer's Cliff, Quebec) which became part of Union in 1925. Sometime after 1933 Rev. W.H. Thomas was called to a parish in McMasterville Quebec. In 1937 Rev. Thomas moved to a small parish in Gould, Quebec.
Rev. W.H. Thomas left the ministry for treatment of cancer however he did not recover from his illness and died November 4, 1945.