William Barnard was born 28 July 1756 in Amesbury, Essex County, Massachusetts, United States to Thomas Barnard (1709-1791) and Martha Handly Hender (1720-1755) and died 18 October 1826 Amesbury, Essex County, Massachusetts, United States of unspecified causes. He married Sarah Bagley (1757-1785) 28 July 1780 .
|Offspring of William Barnard and Sarah Bagley (1757-1785)|
|Benjamin Bagley Barnard (1782-1835)||25 November 1782 Amesbury, Essex County, Massachusetts, United States||18 June 1835 Essex County, Massachusetts, United States||Sally Follansbee (1784-1865)|
|Sarah Barnard (1785-1821)|
|Ezekiel Barnard (1788-1870)|