Interesting how the family seemed to use the same names over and over...Theophilus is a fairly unusual name, but crops up several times in our line. Anyway, I have Theophilus b. 25 Sep 1743 in New Canaan, Fairfield, CT, d. 1812, Cornwallis, Nova Scotia-m. Abigail Bouton b. ca 1742-m. 1763, so must be your line.
I have his parents as Theophilus Rusco, b. 1705 in Norwalk, Fairfield, CT, d. 1769 in Norwalk, Fairfield, CT m. Mary Sweet, b. 1715, of New Canaan,CT, d.1772 m. 1741. Their children were: Stephen Rusco, b. 17 Mar 1742 Theophilus Rusco b. 25 Sep 1743 Josiah Sweet Rusco b. 29 Dec 1745 Martha Rusco b. 5 Jun 1748 Mary Rusco b. 1750