Read Steve Witzki’s excellent article here. The article will also link you to an article by Calvinist John Jefferson Davis who also traces the doctrine back no further than John Calvin. While the truthfulness of such doctrines must ultimately be decided through careful exegesis of Scripture, the novelty of Calvinist doctrines like inevitable perseverance should not be discounted (and personally I would find such things very troubling if I were a Calvinist). Nor should Calvinists continue to make wild claims that their doctrines represent historical Christian orthodoxy. Such claims are simply false.