Isidore (also Isidor) is a male name of Greek origin ("gift of Isis"). A number of people have gone under the name Isidore:

Isidore Ducasse, a French poet and writer, who used the pseudonym Comte de Lautréamont.

Isidor Feinstein Stone, an American journalist

Saint Isidore of Seville

Felipe González used the nom-de-guerre Isidoro (he was from Seville) as a Socialist leader in Franco-era Spain.

Hurricane Isidore, a storm out of twelve and the second hurricane in the 2002 Atlantic hurricane season,

Saint Isidore the Laborer

Chief Isadore of the Ktunaxa (Kootenay) people, noted for his leadership in the Tobacco Plains War

Isidore of Alexandria

Isidore of Miletus, an architect, who designed Hagia Sophia.

Saint Isidore of Pelusium - Catholic Encyclopedia article

Isidore of Charax, a 1st century geographer, cited as a source by Pliny.

Metropolitan Isidore of Kiev = Cardinal Isidore of Thessalonica

It is a surname associated with the Mi'kmaq family line in Nova Scotia.

Isidore is a band composed of Steve Kilbey of The Church and Jeffrey Cain formerly of Remy Zero.