Isidor, a masculine given name ultimately traceable to the Hellenistic Greek Isídōros (Ἰσίδωρος) meaning “gift of Isis” (Isis, the venerated Egyptian goddess, + dōron, “gift”), entered the Christian name stock through several notable bearers, most prominently the encyclopedic seventh-century scholar-bishop Isidore of Seville and the eleventh-century patron of agricultural workers, St. Isidore the Farmer. Carried westward by Latin Christendom, the name settled into various linguistic niches—the Russian ee-SEE-dor and the German ee-zee-DOHR being the best-attested modern pronunciations—while its vowel-final cousin Isidore gained limited currency in English. In the United States, Social Security data reveal a modest crest between the 1880s and the inter-war years, followed by a steady retreat to today’s single-digit annual usages, positioning Isidor well outside the mainstream but not wholly extinct. Its etymological promise of a divinely conferred “gift,” reinforced by associations with scholarship, husbandry, and ecclesiastical learning, lends the name a quiet gravitas that may appeal to parents who value classical depth and historical continuity over contemporary fashion.
| Isidor Rabi was an American physicist who won the 1944 Nobel Prize for his work on the magnetic properties of atomic nuclei. |
| Isidor Straus was an American businessman who co-owned Macy's and briefly represented New York in Congress. |
| Isidor Schneider was an American writer known for his poetry, novels and criticism. |
| Isidor Bush was a writer, publisher, and grape grower. |
| Isidor Arthur Gunsberg was a Hungarian chess player who narrowly lost the 1891 World Chess Championship to Wilhelm Steinitz. |
| Isidor Goldenberg was a Romanian Jewish singer and actor known for his work in Yiddish theater. |
| Isidor Kaufmann was an Austro-Hungarian painter known for his depictions of Jewish and Hasidic life in Eastern Europe. |
| Isidor Isaak Sadger was a Viennese doctor and pioneering psychoanalyst who studied with Sigmund Freud and coined the term sadomasochism. |
| Isidor Natanson was a Swiss-born Soviet mathematician known for his work and textbooks on real analysis and constructive function theory. |
| Isidor Levin was a Latvian-born folklorist who championed Estonian culture and supported researchers during the Soviet occupation. |
| Julius Isidor Rosenthal was a German physiologist born in Labischin. |
| Isidor Joseph Mercier is a Haitian politician from Jeremie who represents the RDNP party in the Chamber of Deputies. |
| Isidor Torkar is a Swedish actor who began acting in 1975 and turned professional in 1982. |
| Isidor Barndt was a German archpriest, poet and world traveler who sought to unite Protestants and Catholics through their shared beliefs. |
| Isidor Petschek was a German Bohemian lawyer and entrepreneur who cofounded the Prague branch of the influential Petschek business dynasty with his brother Julius. |