List of Famous people with last name I

Suppo I was a Frankish nobleman who held lands in the Regnum Italicum in the early ninth century.

Pope Urban I (175?-230) was the bishop of Rome from 222 to 23 May 230. He was born in Rome and succeeded Callixtus I, who had been martyred. It was previously believed for centuries that Urban I was also martyred. However, recent historical discoveries now lead scholars to believe that he died of natural causes.

Pope Benedict I was the bishop of Rome from 2 June 575 to his death.

Pope Sixtus I, also spelled Xystus, a Roman of Greek descent, was the bishop of Rome from c. 115 to his death. He succeeded Pope Alexander I and was in turn succeeded by Pope Telesphorus. His feast is celebrated on 6 April.

Aznar Galíndez I was a Basque Count of Aragon and Conflent from 809 and Cerdanya and Urgell from 820. Aznar has been confused with Aznar Sánchez, Duke of Gascony, and some authorities have even considered the two like-named contemporaries to be one and the same person.

Pope Alexander I was the Bishop of Rome from c. 107 to his death c. 115. The Holy See's Annuario Pontificio (2012) identifies him as a Roman who reigned from 108 or 109 to 116 or 119. Some believe he suffered martyrdom under the Roman Emperor Trajan or Hadrian, but this is improbable.

Herman I was Archbishop of Cologne from 890 to 924. He was the son of Erenfried I of Maasgau, of the Ezzonian dynasty.

Wigger I was the father of a line of counts ruling from his new castle of Bilstein, west of Albungen to the Werra. The counts of Bilstein played a prominent role in Thuringia from 967 to 1301 and were third after the Ekkehardinger and Weimar-Orlamünde in terms of power and influence.

Pope Agapetus I was the bishop of Rome from 13 May 535 to his death.

Pope Callixtus I, also called Callistus I, was the bishop of Rome from c. 218 to his death c. 222 or 223. He lived during the reigns of the Roman Emperors Elagabalus and Alexander Severus. Eusebius and the Liberian catalogue gave him five years of episcopate (217–222). In 217, when Callixtus followed Zephyrinus as Bishop of Rome, he started to admit into the church converts from sects or schisms. He was martyred for his Christian faith and is venerated as a saint by the Catholic Church.