Save Gender Masculine Usage Late Greek, Greek (Rare) Scripts Θεόπιστος(Greek) Other Forms FormsTheopistus (latinized form) Meaning & History Derived from the Greek adjective θεόπιστος (theopistos) meaning "faithful to God", which consists of the Greek noun θεός (theos) meaning "god" and the Greek adjective πιστός (pistos) meaning "faithful, trusty" (also see Pistis).