Individual Details

Mary was the daughter of Joseph and Rebeckah Farnsworth, born 12 March 1727/8 in Groton and listed in the Groton births. Listed in Groton marriages - "Farnsworth, Mary, and Jonathan Avery of Townsend, at Townsend, Jan 9, 1752. [Massachusetts Vital Records; American Ancestor.org]


There appear to have been multiple Mary Farnsworths, born within a few years of each other.

Mary wasn't the daughter of Isaac Farnsworth and Sarah Page who had married 1723. Born 6 Jun 1735 in Lunenburg, Worcester Co MA.

There is another conflict:
Another researcher gives her parents as Aaron Farnsworth and Hannah Barron. This Mary was born 29 Jan 1732 in Groton, died 19 Sep 1796, Charlestown, Sullivan Co, NH.
Some of the children of Mary & Jonathan Avery were born in Hillsborough Co,New Hampshire, but I find no connection to Sullivan Co.

Birth	12 Mar 1728	Groton, Middlesex County, Massachusetts
Marriage	9 Jan 1752	Townsend, Middlesex County, Massachusetts - Jonathan AVERY

Spouse	Jonathan AVERY (1728 - )
Child	Jonathan Avery (1753 - )
Child	Timothy Avery (1754 - )
Child	Samuel Avery (1758 - )
Child	John Avery (1760 - )
Child	Peter Avery (1762 - )
Child	Joel Avery (1764 - )
Child	Aaron Avery (1766 - )
Child	Mary Avery (1768 - )

Father	Joseph Farnsworth (1698 - 1731)
Mother	Rebecca Gibson (1704 - 1754)
Sibling	Rebekah Farnsworth (1729 - )
Sibling	Daniel Farnsworth (1731 - )