Rabenu Sa’adiah Gaon’s Arabic translation calls Avraham Avinu in Parshas Lech Lecha an Imam…
Of course, “Imam” just means Cohen!
See also the Rasag translation on Malki-Tzedek, (Onkleus Breishis 14:18 has “משמש קדם אל עילאה”, as Ibn Ezra explains there per וכהנו לי), and on Potiphar, called “Cohen On”.
By the way, bald monkeys aren’t “Nazirites”, either (נזירים)! — secular Hebrew to the contrary notwithstanding.