A will for Gilbert Shelly written in 1837 in Westchester County names the following children of Gilbert and Elizabeth:
Samuel, of Kortright, Delaware County
Eliza, wife of Frederick Fisher
Sarah, wife of Jesse P. Purdy
and grandchildren: Josiah Wilkins, Griffin Wilkins, George Wilkins, Harvey Wilkins, Sarah Adelia Dunham and Esther Dunham.
I am descended from Mary Shelly Sherwood, who I suspect was the sister of Gilbert above.
Hope this helps.