William Mangnall was born in Westhoughton in 1829 and was the son of Abel Mangnall (1797) and Ellen. In 1841 and 1851 he was living in Dobb Brow, Westhoughton and working as a silk weaver.

Sources
• 1. 1851 Census. Dobb Brow, Westhoughton. William Mangnall. Son. Age 22. Silk Weaver. Born Westhoughton. • 2. 1841 Census. Dobb Brow, Deane. William Mangnall. Age 13. Silk Weaver. Born Lancashire.