Aaron is a boy’s name of Biblical, Hebrew and Literary origin. Meaning in Biblical: A teacher; lofty; mountain of strength. Meaning in Hebrew: Lofty; exalted; high mountain. Biblically, Aaron was Moses’ older brother (and keeper by God’s command). He was first high priest of the Israelites, remembered for the miraculous blossoming of his staff or rod. A literary name from Shakespeare’s The Tragedy of Titus Andronicus, where it belongs to a Moor, beloved by Tamora. The name has 5 letters.