William Mangnall was born in 1762 and christened in Westhoughton on 12th March 1762. He was the son of Lawrence Mangnall (b.1733) and Betty Rigby. He married Ann Harrison on 30th April 1784 at Deane By Bolton.

Sources
• 1. International Genealogical Index. William Mangnall. Christened 12 March 1762, Westhoughton. Father: Lawrance. • 2. International Genealogical Index. William Mangnall married Ann Harrison on 30. 4. 1784, Deane By Bolton. • 3. International Genealogical Index. William Mangnall. Father of Lawrence Mangnall, b. 1795.