Haroon is the Urdu and South Asian spelling of Harun, the Arabic form of Aaron, the brother of Moses; its meaning is uncertain and usually explained as "mountain of strength" or "exalted". The Abbasid caliph Harun al-Rashid, famous from the Arabian Nights, is the name's best-known bearer. In the United States Haroon has moved up from number 2733 in 2015 to number 1781 in 2025, its highest rank so far.