List of Famous people with last name I

Pope Eugene I was the bishop of Rome from 10 August 654 to his death. He was chosen to become pope after the deposition and banishment of Martin I by Emperor Constans II over the dispute about Monothelitism.

Pope Celestine I was the bishop of Rome from 10 September 422 to his death on 1 August 432. Celestine's tenure was largely spent combatting various ideologies deemed heretical. He supported the mission of the Gallic bishops that sent Germanus of Auxerre in 429, to Britain to address Pelagianism, and later commissioned Palladius as bishop to the Scots of Ireland and northern Britain. In 430, he held a synod in Rome which condemned the apparent views of Nestorius.

Pope John I was the bishop of Rome from 13 August 523 to his death. He was a native of Siena, in Italy. He was sent on a diplomatic mission to Constantinople by the Ostrogoth King Theoderic to negotiate better treatment for Arians. Although John was relatively successful, upon his return to Ravenna, Theoderic had him imprisoned for allegedly conspiring with Constantinople. The frail pope died of neglect and ill-treatment.

Abu l-Hasan Ali I, also known as Ali Pasha and Ali Bey I,) was the second leader of the Husainid Dynasty and the ruler of Tunisia from 1735 to 1756.

Pope Stephen I was the bishop of Rome from 12 May 254 to his death on 2 August 257.

Harshavarman I was an Angkorian king who reigned in 910–923 CE. He is mentioned by David P. Chandler, who is one of the foremost western scholars of Cambodia's modern history.

Pope Felix I was the bishop of Rome from 5 January 269 to his death on 30 December 274.