John was the son of the Son of Solomon Holman III (b.1723) and Sarah (Waite) Holman. He was born Sept 2, 1766 at Lancaster MA.
See
* https://www.familysearch.org/ark:/61903/3:1:S3HY-6P97-59D, Solomon Holman entry for John Holman, Sept 24, 1766 and David Holman, June12,1770 ; citing Births, Lancaster, Worcester, Massachusetts Bay, British Colonial America, The birth, marriage, and death register, church records and epitaphs of Lancaster, Massachusetts, 1643-1850; FHL 004362848
* The Holmans in America; Concerning the Descendants of Solaman Holman. Holman, David Emory. New York: The Grafton Press, 1909. Page 12