Biggs Family of Iver Buckinghamshire England

Searching for more information regarding the family of John and Mary BIGGS, whose son John was born in Buckinghamshire around 1770. John Jr. married Martha THACKTHWAITE, and their son WILLIAM BIGGS was born in 1797 in Iver, Buckinghamshire, England. William moved to London and married Emily LEWIS (1799-1868). Their children were all baptized at All Souls Church, Marylebone, London, England. William was an upholsterer in London for most of his life, but he retired to Oxford where he lived with his son, Frank Lewis Biggs. We presume he died in Oxford.

We would like to know more about the origins of this family.