John Ross met Betsy Griscom when both were employees of an upholsterer named William Webster. They young eloped in 1773, and were married at Hugg's Tavern in Gloucester City, New Jersey. John Ross was an Anglican (Episcopalian) and Betsy came from a Quaker family. Their marriage caused a split from her Griscom family and her expulsion from the Quaker congregation.
John and Betsy Ross established their own upholstery business. They became members of Christ Church, Philadelphia, where fifteen signers of the American Declaration of independence also worshipped, including George Washington when in Philadelphia. 
John Ross was a member of the Philadelphia; Pennsylvania Provincial Militia. Barely two years after John and Betsy Ross were married, the American Revolutionary War began in 1775. John Ross is said to have been on duty guarding munitions when killed by a gunpowder explosion. 
WikiTree profile Ross-1181 created through the import of Edwards Family Tree.ged on May 29, 2011 by Kennon Edwards. See the Changes page for the details of edits by Kennon and others.
Source: S1730862093 Repository: #R1730539867 Title: Ancestry Family Trees Publication: Online publication - Provo, UT, USA: Ancestry.com. Original data: Family Tree files submitted by Ancestry members. Note: This information comes from 1 or more individual Ancestry Family Tree files. This source citation points you to a current version of those files. Note: The owners of these tree files may have removed or changed information since this source citation was created. Page: Ancestry Family Trees Note: Data: Text: http://trees.ancestry.com/pt/AMTCitationRedir.aspx?tid=15043181&pid=1434035763
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.
Y-chromosome DNA test-takers in his direct paternal line on WikiTree: