Are your dates absolute?My ggg-grandfather, Peleg Briggs was born 1781 in Dutchess Co., NY and had a son John by his first wife (possibly named Hannah Case).He also had four children by his second wife Hannah Baldwin.All five children are mentioned in his will dated 1850.
The John Briggs I have listed in my database are:
Name-Birthdate-Birthplace 1.Honorable John Briggs-1609-Clerkenwell, London, England
2.John Briggs-UNKNOWN-UNKNOWN-parents Peleg (1781-1866) Hannah (Baldwin)Briggs.He was probably born in Dutchess County as Peleg's younger children were.
3.John Briggs-10/02/1678-Dartmouth, Bristol Co., MA
4.John Briggs-UNKNOWN-Pine Plains, Dutchess Co., NY-parents Anthony (1753-1834) Briggs and Elizabeth Case (brother of Peleg)
5.John Briggs-02/10/1746-Dartmouth, Bristol Co., MA
6.John Briggs-1642-Portsmouth, RI
7.John Briggs-UNKNOWN-UNKNOWN-parents Jobe (1648-1733) and Elinor Briggs
8.John Briggs-1739-UNKNOWN-parents Jobe Jr. and Mary Coggeshell Briggs
9.John Briggs-1758-UNKNOWN-parents George (1734-1816) and Hannah Coggshell Briggs
10. John Briggs-1615-Possibly Sandwich, MA
11. John Berry Briggs-1880-UNKNOWN
12. John Berry Briggs-1856-Fond du Lac, WI
I don't know if any of these are who you are looking for but maybe it will give you some added information.