List of Famous people with last name I

Clovis was the first king of the Franks to unite all of the Frankish tribes under one ruler, changing the form of leadership from a group of royal chieftains to rule by a single king and ensuring that the kingship was passed down to his heirs. He is considered to have been the founder of the Merovingian dynasty, which ruled the Frankish kingdom for the next two centuries.

Wahibre Psamtik I (Ancient Egyptian: wꜣḥ-jb-rꜥ psmṯk, known by the Greeks as Psammeticus or Psammetichus, who ruled 664–610 BC, was the first of three kings of that name of the Saite, or Twenty-sixth Dynasty of Egypt.

Nakamura Kichiemon I was a Japanese actor and kabuki performer. In 1945, he became the senior living kabuki actor in Japan.

Muhammad I was a son of Seljuq Sultan Malik Shah I. In Turkish, Tapar means "he who obtains, finds".

Justinian I, also known as Justinian the Great, was the Eastern Roman emperor from 527 to 565.

Kilij Arslan (‎1079–1107) was the Seljuq Sultan of Rûm from 1092 until his death in 1107. He ruled the Sultanate during the time of the First Crusade and thus faced the attack. He also re-established the Sultanate of Rum after the death of Malik Shah I of Great Seljuq and defeated the Crusaders in three battles during the Crusade of 1101.

Kayqubad I or Alā ad-Dīn Kayqubād bin Kaykhusraw was the Seljuq Sultan of Rûm who reigned from 1220 to 1237. He expanded the borders of the sultanate at the expense of his neighbors, particularly the Mengujek Beylik and the Ayyubids, and established a Seljuq presence on the Mediterranean with his acquisition of the port of Kalon Oros, later renamed Ala'iyya in his honor. The sultan, sometimes styled "Kayqubad the Great", is remembered today for his rich architectural legacy and the brilliant court culture that flourished under his reign.

Abd al-Rahman I, more fully Abd al-Rahman ibn Mu'awiya ibn Hisham ibn Abd al-Malik ibn Marwan (731–788) was the founder of the Arab dynasty that ruled the greater part of Iberia for nearly three centuries. Abd al-Rahman was a member of the Umayyad dynasty in Damascus, and his establishment of a government in Iberia represented a break with the Abbasids, who had overthrown the Umayyads in 750.

Frederick Barbarossa, also known as Frederick I, was the Holy Roman Emperor from 1155 until his death 35 years later. He was elected King of Germany at Frankfurt on 4 March 1152 and crowned in Aachen on 9 March 1152. He was crowned King of Italy on 24 April 1155 in Pavia and emperor by Pope Adrian IV on 18 June 1155 in Rome. Two years later, the term sacrum ("holy") first appeared in a document in connection with his empire. He was later formally crowned King of Burgundy, at Arles on 30 June 1178. He was named Barbarossa by the northern Italian cities which he attempted to rule: Barbarossa means "red beard" in Italian; in German, he was known as Kaiser Rotbart, which has the same meaning. The prevalence of the Italian nickname, even in later German usage, reflects the centrality of the Italian campaigns to his career.

Ismail I, also known as Shah Ismail I, was the founder of the Safavid dynasty, ruling from 1501 to 23 May 1524 as Shah of Iran (Persia).