He is married to Mary Dyer.
They got married at "Second affidavit of Mary Dyer gives her maiden, name as Mary Marcy and says she was married, in Sturbridge, Mass. by Moses Marcy, Justice of the Peace.
They got married at A copy is submitted from the Sturbridge records of "'Intention of marriage between James Dyer and' Mary Marcy, Dec. 9th, 1776 both. of Sturbridge, were entered. Attest. Joshua Harding, T. Clerk. They got married on December 9, 1776 at Sturbridge, Worchester, Massachusetts, he was 20 years old.Child(ren):
http://trees.ancestry.com/pt/AMTCitationRedir.aspx?tid=165876371&pid=11047/ Ancestry.com