The Dublin Town History (source below) notes he "m. Susannah White; res. in D[ublin]. a long time; had a large family; d. at Northfield, Mass."
Sources
“The History of Dublin, N.H. : containing the address by Charles Mason, and the proceedings at the centennial celebration, June 17, 1852, with a register of families” by Dublin (N.H.); Leonard, L. W. (Levi Washburn), 1790?-1864; Seward, Josiah Lafayette, 1845-1917; Mason, Charles, 1810-1901 Publication date 1920 Publisher Dublin, N.H. : The Town (p: 765), Digital Version here: [1]
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DNA Connections
It may be possible to confirm family relationships with John by comparing test results with other carriers of his ancestors' Y-chromosome or mitochondrial DNA.
However, there are no known yDNA test-takers in his direct paternal line.
Mitochondrial DNA test-takers in the direct maternal line:
~0.78%Kim Williams :
AncestryDNA, GEDmatch A448727[compare], yourDNAportal KIM7b51fe75, Ancestry member williams_kimj
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Family Tree DNA Family Finder, GEDmatch A448727[compare], yourDNAportal KIM7b51fe75, FTDNA kit #B706290