I have several Elizabeth Benns in this time period: Elizabeth Benn, b. 1857 in Windsor, Broome County, NY - daughter of Henry Benn &Elizabeth B. of that place.This daughter married someone with the surname Owen.I don't know anything about where they went.
Elizabeth A. Benn, b. 1834 in Broome County NY to John Benn andElizabth Moore who moved to Woods County , OH. Elizabeth m. James Rogers, posibly in OH.
I also have record of an Elizabeth Bain/Benn born between 1769 -1700 to David Bain/Benn and Anatjen Gardner in Columbia County, NY.