A number of people have gone under the name Isidore:

• Isidore of Alexandria
• Isidore of Charax, a 1st century geographer, cited as a source by Pliny.
• Isidore of Miletus, an architect, who designed Hagia Sophia.
• Saint Isidore of Seville
• Saint Isidore of Pelusium - Catholic Encyclopedia article
• Metropolitan Isidore of Kiev = Cardinal Isidore of Thessalonica
• Saint Isidore the Laborer
• Felipe González used the nom-de-guerre Isidoro (he was from Seville) as a Socialist leader in Franco-era Spainoun
• Isidore Ducasse, a French poet and writer, who used the pseudonym Comte de Lautréamont.
• It is a surname associated with the Mi'kmaq family line in Nova Scotia.
• Chief Isadore of the Ktunaxa (Kootenay) people, noted for his leadership in the Tobacco Plains War
• Hurricane Isidore, a storm out of twelve and the second hurricane in the 2002 Atlantic hurricane season,
• Isidore is a band composed of Steve Kilbey of The Church  and Jeffrey Cain formerly of Remy Zero.
• Isidor Feinstein Stone, an American journalist