predecessor
I
noun
ancestor, antecedent, antecessor, elder, forebearer, forefather, foregoer, foreparent, forerunner, former incumbent, former officeholder, founder, originator, patriarch, precursor, procreator, progenitor
II
index
ancestor, ascendant, forerunner, parents, pioneer, precedent, precursor, primogenitor, progenitor
Burton's Legal Thesaurus.
William C. Burton.
2006