Hi!Anson Rusco(e) was indeed the brother of Reuben.
Their parents were Benjamin Rusco b.03 May 1756 Stamford, CT d. 07 February 1830 Greenwich, OH and Esther (unknown)b. January 1746/47 d.11 January 1828.
His father was Theophilus Ruscoe b. Abt. 1707 Norwalk, CT d. 1812 married to Mary Sweet they had 7 children.
His father was Thomas Ruscoe b. 1651 Norwalk, CT d. 1739 New Canaan, CT wife was Abigail unknown. There were 11 children.
Anson b.09 September 1784 Stamford, Ct d. 29 December 1853 and his wife Cynthia Allen b.20 January 1792 Cambridge, Wash. Co., NY d. 04 July 1875 Camden, Onieda,NY where they are both buried at Forest Park Cemetery. They had 5 children.
I have Anson & Cynthia's Bible, where I came upon some of this information.
Feel free to contact me with more information, corrections, or questions. Marilynne Roscoe