The "Jamestown Proprietors Records" Vol. I p. 7 documents this marriage of John Martin & Phebe Remminton on 25 February 1721, by Nicholas Carr, Warden.
He may be the William Martin who witnessed the Jamestown wills of David Greene on 21 July 1759, John Hull on 20 Nov 1759 and again the codicil on 30 January 1762, and John Hammett on 9 August 1766.