I read that your Mary Stilwell born 1762 married John Ferris in 1782 at a United Brethren Congregation commonly called Moravian, Richmond Staten Island, New York. I found a John Stilwell born 1735 married to Mary Muliner. John's parents were Nicholas Stillwell and Martha ? John's son Joshua Stilwell born 1760 married Susan Skerrit. I found a Susan Stilwell and a Daniel Stilwell in Moravian Church records. Daniel married Hanna Skerrit. Thomas Edison descends from John Stilwell and Mary Muliner.