predecessor (n.)
late 14c., "one who has held an office or position before the present holder," from Old French predecesseor "forebear" and directly from Late Latin praedecessorem (nominative praedecessor), from Latin prae "before" (see pre-) + decessor "retiring official," from decess-, past participle stem of decedere "go away," also "die" (see decease (n.)). Meaning "ancestor, forefather" is recorded from c.1400.