There was a John Cummings born 16 Mar 1736/1737 in Groton, Middlesex, MA to John and Sarah (Lawrence) Cummings. He married Rebecca Reed 6 Aug 1761 in Littleton, Middlesex, MA. They had nine children in Hollis, Hillsboro, N.H.: Peter 1761, Rebecca 1764, Sarah 1766, John 1769, Rebecca 1771, Abigail 1774, Asahel 1777, Henry 1779, Nenaiah, 1782. His tenth child was Betty, born 10 Oct 1784 recorded in Hancock, Hillsboro, N.H. She had a younger sister Polly 1791, also recorded in Hancock. There is no record of a marriage for Betty.
His line was himself John 6, John 5, John 4, John 3, John 2, Isaac 1. This is found in Mooar's Cummings Memorial, page 96 and Cummins' Cummings Genealogy, page 102.
David Butler Cummings