I believe she lived long after 1699. Margaret Sutherland was recorded with husband William Sutherland in New York City in 1998 and Ulster Co in 1705 and Quaseck near Highland, NY from 1707-22 Jun 1718. A detailed and sourced timeline is available on her WIkiTree profile:
https://www.wikitree.com/wiki/Toshach-6
