Aaron comes from the Hebrew name Aharon (אהרן), which is thought to mean "exalted," "teacher," or "mountain of strength." It is associated with Abrahamic religions; Aaron was known in the Torah, Bible, and Quran as Moses’ older brother and a priest of the Isrealites. The h is dropped in some variations, such as Greek and English, leading to the double-a spelling. Aaron has been in use as a name in English since the Protestant Reformation, although the name peaked in popularity in the late 20th century.