someone or something that came before another person/thing and this has since been replaced, especially a person who previously held an office or position before the current holder;
e.g. The club president consulted her predecessor for advice on how to lead the meetings.
(noun)
in old usage, a member of one's family who is no longer alive, i.e. an ancestor;
e.g. He followed the advice of his predecessor when choosing a course of action.