Mercy Barnaby, the daughter of Timothy and Martha Barnaby, married John Newcomb (29 Jul 1720 - 13 Apr 1778) 5 Jun 1747. They had 11 children: Joseph, Benjamin, John, Catharine, Martha, Alice, Mary, Lydia, Ruth, Jonathan, Jacob. Mercy died 27 Mar 1776. John's second wife, with whom he had one child, was Deborah, a widow whose married name was Miller.
Source: J.B. Newcomb, B.M. Newcomb