Sources & Information:

Item 1.Seth 5 Ellis will was dated 18 February 1820.
Item 2.The Register, October 1968, p. 257.
Col. Harry H. Ellis, Dallas, Tx.
Item 3.IGI RECORD ---
Seth ELLIS, male. Event: Birth: 22 Nov 1769, Sandwich, Barnstable, Ma.
Parents: Father: Elnathan ELLIS. Mother: Bethiah BASSETT.
Source Info: Film No. 537569 & 537977. Page No. 19, Reference No. 96005.
Item 4.Vital Records of Sandwich, Massachusetts to 1885, Volume 1, page 219 is found the following:
"Seth Ellis Son of Elnathan Ellis & Bethiah his wife was born at Barnstable Novr 22d A.D. 1769."
Item 5.Vital Records of Sandwich, Massachusetts to 1885, Volume 1, page 321 is found Seth Ellis and wife Elener [note spelling] and births of the following children Reuben Lawrence Ellis, Jonathan Ellis, Abial Ellis and Hannah Ellis.