List of Famous people with last name I

Johann Strauss I was an Austrian Romantic composer. He was famous for his waltzes, and he popularized them alongside Joseph Lanner, thereby setting the foundations for his sons to carry on his musical dynasty. He is best known for his composition of the Radetzky March.

Kaykhusraw I, the eleventh and youngest son of Kilij Arslan II, was Seljuk Sultan of Rûm. He succeeded his father in 1192, but had to fight his brothers for control of the Sultanate, losing to his brother Suleiman II in 1196. He ruled it 1192–1196 and 1205–1211.

John Jacob Astor was a German–American businessman, merchant, real estate mogul, and investor who made his fortune mainly in a fur trade monopoly, by smuggling opium into China, and by investing in real estate in or around New York City. He is known for being the first multi-millionaire businessman of the United States.

Pope Adrian I was the bishop of Rome and ruler of the Papal States from 1 February 772 to his death. He was the son of Theodore, a Roman nobleman.

Mieszko I was the first ruler of Poland and the founder of the first independent Polish state, the Duchy of Poland. His reign stretched from 960 to his death and he was a member of the Piast dynasty, a son of Siemomysł and a grandson of Lestek. He was the father of Bolesław I the Brave and of Gunhild of Wenden. Most sources identify Mieszko I as the father of Sigrid the Haughty, a Scandinavian queen, the grandfather of Canute the Great and the great-grandfather of Gunhilda of Denmark, Canute the Great's daughter and wife of Henry III, Holy Roman Emperor.

Artaxias I was the founder of the Artaxiad dynasty of Armenia, ruling from 189 BC to 160 BC. He was succeeded by his son Artavasdes I.

Mesud I, Masud I or Mas‘ūd I (Modern Turkish: I. Rükneddin Mesud or Rukn al-Dīn Mas'ūd was the sultan of the Sultanate of Rûm from 1116 until his death in 1156.

Menmaatre Seti I was a pharaoh of the New Kingdom Nineteenth Dynasty of Egypt, the son of Ramesses I and Sitre, and the father of Ramesses II. As with all dates in Ancient Egypt, the actual dates of his reign are unclear, and various historians claim different dates, with 1294 BC to 1279 BC and 1290 BC to 1279 BC being the most commonly used by scholars today.

Hayashiya Sanpei I was a Japanese Rakugo comedian. His trademark line was "Sō nansu, okusan!". Hayashiya Shōzō IX and Hayashiya Sanpei II are his sons and Yasuha is his daughter.

Fuad II is a member of the Egyptian Muhammad Ali dynasty. He formally reigned as the last King of Egypt and the Sudan from July 1952 to June 1953, when he was deposed.