Someone coming from a Jewish family but not halakhically Jewish (e.g., with a Jewish maternal grandfather but not grandmother) is converting through an an Orthodox conversion. That person then discovers her maternal grandfather's last name meant he was probably a Kohen.
Are there implications for the children or grandchildren of that person since children of Kohanim who married 'forbidden' women can be chalal? On the other side I heard conversion is like being reborn and family history doesn't apply.
What if the person wanting to convert discovers that one of the grandfathers was a kohen who had a child with a nonJewish woman, would the convert be a *chalal* once he or she becomes Jewish?