Ali ibn Husayn (King of the Hejaz)
Ali ibn Husayn, last King of the Hejaz; his father abdicated the throne and the caliphate claim to him in October 1924; he held Jeddah until it fell to Abd al-Aziz ibn Saud in December 1925, then fled to Iraq.
Rival claim · Sharifian Caliphate · no. 1 in the chain · 1924–1925 CE
Claimed the caliphate against the standing caliphate