Son of unknown father and mother. He was born the monday 29 september 1749 in Halifax, Plymouth, Massachusetts. Sylvanus is deceased in Hanover, Grafton, New Hampshire the monday 5 february 1787 aged of 37 years old.
a. Sylvanus is married with Abigail Wheelock, daughter of Eleazer Wheelock and Mary Brinsmead. She was born the tuesday 21 december 1751 in Lebanon, New London, Connecticut. Abigail is deceased in Hanover, Grafton, New Hampshire the thursday 9 april 1818 aged of 66 years old.
No children were born from this union.