Lawrence Mangnall was born in 1733 and christened in Deane By Bolton on 11th April 1733. He was the son of Lawrence Mangnall (b.1695) and Alice Coupe. He married Betty Rigby sometime before 1762.

Sources
• 1. International Genealogical Index. Lawrence Mangnall. Christened 11 April 1733, Deane By Bolton. Father: Laurence. • 2. International Genealogical Index. Lawrence Mangnall married Betty Rigby.