Jean Foster Graham (Cowen) - Sources

Her maiden name is Foster/Forrester if anything, and she had no middle name. (Assuming she exists in reality at all.) "Cowen" arrived out of nowhere a few years ago and gradually proceeded to work its way from being her "middle name" to replacing her original maiden name. How does that happen on a curated profile, without corroborating sources? She was born in ca. 1675. So NC marriage bonds, 1741 - 1868, even if they were readable which they are not here -- can hardly apply, as she would have been at least 60 years old at time of marriage and way too old for having children.