William Avery was born circa 1692 at New London, New London County, Connecticut. He was the son of 
John Avery and 
Abigail Chesebrough. William Avery was baptized on 19 June 1692 at First Church, New London, New London County, Connecticut. He married 
Anne Richardson, daughter of 
Samuel Richardson and 
Anne Chesebrough, on 27 March 1715 at First Church, Stonington, New London County, Connecticut. William Avery married 
Sarah Walker, daughter of 
William Walker and 
Eleanor Pendleton, on 3 June 1731 at Westerly, RI. William Avery died circa 1754 at Stonington, New London County, Connecticut.