Matthias married Mercy Nye about 1678/9 in Sandwich, Barnstable, Massachusetts, United States. Mercy (daughter of Benjamin Nye and Katherine Tupper) was born on 4 Apr 1652 in Sandwich, Barnstable, Massachusetts, United States; died in 13 Nov 1744–7 Nov 1749 in Sandwich, Barnstable, Massachusetts, United States. [Group Sheet] [Family Chart]

1. Capt. Joel Ellis was born on 17 Jan 1679/80 in Sandwich, Barnstable, Massachusetts, United States; died on 21 Jun 1763 in Middleboro, Plymouth, Massachusetts, United States; was buried in Middleboro, Plymouth, Massachusetts, United States.
2. Matthias Ellis was born on 5 Nov 1681 in Sandwich, Barnstable, Massachusetts, United States; and died.
3. John Ellis was born on 17 Aug 1683 in Sandwich, Barnstable, Massachusetts, United States; died on 12 Dec 1717 in Sandwich, Barnstable, Massachusetts, United States.
4. Mercy Ellis was born on 16 Aug 1685 in Sandwich, Barnstable, Massachusetts, United States; died before 30 Oct 1751 in Sandwich, Barnstable, Massachusetts, United States.
5. Experience Ellis was born on 26 Jul 1687 in Sandwich, Barnstable, Massachusetts, United States; died in 2 Sep 1750–21 Sep 1751 in Sandwich, Barnstable, Massachusetts, United States.
6. Malachi Ellis was born on 8 Oct 1689 in Sandwich, Barnstable, Massachusetts, United States; and died.
7. Remember Ellis was born on 1 Dec 1691 in Sandwich, Barnstable, Massachusetts, United States; and died.
8. Mehitable Ellis was born on 31 Dec 1693 in Sandwich, Barnstable, Massachusetts, United States; died in 20 Sep 1751–8 Nov 1751 in Taunton, Bristol, Massachusetts, United States.
9. Samuel Ellis was born on 12 Nov 1699 in Sandwich, Barnstable, Massachusetts, United States; and died.

John married Elizabeth Freeman in BY 20 Aug 1644 in Plymouth, British America. Elizabeth (daughter of Edmond Freeman) and died. [Group Sheet] [Family Chart]