Ordered chronologically

Religious figures edit

• Isidore of Alexandria (died 403), Egyptian priest, saint
• Isidore of Chios (died 251), Roman Christian martyr
• Isidore of Scété (died c. 390), 4th-century A.D. Egyptian Christian priest and desert ascetic
• Isidore of Pelusium (died c. 449), Egyptian monk, saint and prolific letter writer
• Isidore of Seville (c. 560–636), Catholic saint and scholar, last of the Fathers of the Church and Archbishop of Seville
• Isidore the Laborer (c. 1070–1130), Spanish religious leader
• Isidore I of Constantinople (died 1350), Greek Ecumenical Patriarch (1347–1350)
• Isidore II of Constantinople (died 1462), Greek Ecumenical Patriarch (1456–1462)
• Isidore of Kiev (1385–1463), Greek religious leader and theologian

Others edit

• Isidore of Charax (fl. 1st century), Greek geographer
• Isidore of Alexandria (died c. 520), Greco-Egyptian philosopher
• Isidore of Miletus, Greek architect who co-designed the Hagia Sophia in Constantinople from 532 to 537
• Isidore (inventor), according to legend the Russian Orthodox monk erroneously credited with producing the first genuine recipe of Russian vodka, c. 1430

Ordered alphabetically by last name

• Isidore Gordon Ascher (1835–1933), British-Canadian novelist and poet
• Isidor Bajic (1878–1915), Serbian composer, pedagogue and publisher
• Isidore Bakanja (c. 1885–1909), beatified martyr in the Belgium Congo
• Isidor George Beaver (1859–1934), British-born Australian architect
• Isadore Coop (1926-2003), Canadian architect
• Isador Coriat (1875–1943), American psychiatrist and neurologist
• Ivor Cutler (born Isadore; 1923–2006), Scottish poet, songwriter and humorist
• Isidore Ducasse (1846-1870), French poet best known under the nom de plume of Comte de Lautréamont
• Isidor Izzy Einstein (1880–1938), American federal police officer during the Prohibition era
• Isidor Fisch (1905–1934), German associate of Bruno Hauptmann
• Isadore Friz Freleng (1906–1995), American cartoonist
• Isador Goodman (1909–1982), South African-Australian musician and composer
• Isidor Gunsberg (1854–1930), Hungarian chess player
• Isidore Itzkowitz (1892–1964), better known as Eddie Cantor, American performer and comedian
• Isadore Gilbert Jeffery (1840-1919), American poet, lyricist
• Isidor Kaufmann (1853–1921), Austro-Hungarian painter of Jewish themes
• Izidor Kürschner (1885–1941), Hungarian football player and coach
• Isadore Gilbert Mudge (1875–1957), American librarian
• Isidore Newman (fl. 1903), founder of the Isidore Newman School
• Isidor Philipp (1863–1958), Hungarian-French pianist, composer and pedagogue
• Isidor Isaac Rabi (1898–1988), Galician-born American physicist and Nobel laureate
• Isidor Rosenthal (1836–1915), German physiologist
• Isadore Singer (1924-2021), American mathematician
• Isador Sobel (1858–1939), American lawyer
• Isidore Spielmann (1854–1925), British art critic and exhibition organizer
• I. F. Stone (1907–1989), American investigative journalist
• Isidor Straus (1845–1912), co-owner of Macy's, drowned in the sinking of RMS Titanic
• Isador Samuel Turover (1892–1978), Belgian-American chess master
• Chief Isadore (fl. 1860s), leader of the Ktunaxa/Kootenay people in the Tobacco Plains War