Ruth A. Baker, Compiled by the Bicentennial genealogy committee, Ruth A. Baker, chairman, History and genealogy of the families of Chesterfield, Massachusetts, 1762-1962 (The Town of Chesterfield, Massachusetts, 1962), page 61.
"Massachusetts Vital Records to the end of the year 1949" (Salem, MA: The Essex Institute Salem, MA, 1934), Vol. Brookfield-V1 page 52; digital image, AmericanAncestors.org online data base
It may be possible to confirm family relationships with Josiah by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA.
However, there are no known yDNA or mtDNA test-takers in his direct paternal or maternal line.
It is likely that these autosomal DNA test-takers will share DNA with Josiah: