He was born when his father was leading a campaign in 'Asir against Muhammad ibn Ali al-Idrisi of 'Asir; so he was named Ghazi (meaning warrior due to this campaign, In his childhood, Ghazi was left with his grandfather, Hussein bin Ali, the Hashemite Grand Sharif of Mecca and head of the royal house of Hashim, who called Ghazi "Awn" after his great-grandfather Awn bin Muhsin, while his father was occupied with travel and in military campaigns against the Ottomans. The Hashemites had ruled the Hijaz within the Ottoman Empire before rebelling with British assistance in the later stages of World War I. He attended Harrow School.