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Name Lineage

    The first name Isadore

    A boy’s name from Greek.

    Pronounced /ˈɪzədɔɹ/ 4 syllables Male

    Meaning and origin

    Greek origin

    A non-standard variant of Isidore, possibly inspired by the well-known feminine variant Isadora of Isidora.

    From Wiktionary (CC BY-SA 4.0).

    Popularity in the United States

    Babies named Isadore at birth, 1880–2025

    In 2025, 15 boys born in the United States were named Isadore, the 5,963rd most popular boys’ name that year. It was used most in 1916, when 273 were.

    0150300 188018851890189519001905191019151920192519301935194019451950195519601965197019751980198519901995200020052010201520202025
    GirlsBoys
    5,909
    babies named Isadore since 1880
    #5,963
    rank in 2025
    1916
    peak year

    US Social Security Administration, from applications for a Social Security card. A name is only published for a year when at least five babies were given it, so quieter years show as zero.

    Famous people named Isadore

    6 on Wikidata, most written-about first

    • Isadore Singer
      American mathematician (1924–2021)
    • Isadore Sharp
      Canadian businessman, born 1931
    • Joe Lieberman
      American politician (1942–2024)
    • Friz Freleng
      American animator, cartoonist, director, and producer (1906–1995)
    • I. J. Good
      British statistician and cryptographer (1916–2009)
    • Irving Mills
      American music publisher, singer, lyricist, and jazz artist promoter (1894-1985)

    More Greek boys’ names

    All 347 names of Greek origin

    Questions

    What does the name Isadore mean?
    A non-standard variant of Isidore, possibly inspired by the well-known feminine variant Isadora of Isidora.
    What is the origin of the name Isadore?
    A non-standard variant of Isidore, possibly inspired by the well-known feminine variant Isadora of Isidora.
    Is Isadore a boy's or a girl's name?
    Mostly a boy's name: 97% of the 5,909 US babies named Isadore since 1880 were boys.
    When was Isadore most popular?
    1916 in the United States, when 273 babies were named Isadore, its highest rank at 318th.
    How do you pronounce Isadore?
    Isadore is /ˈɪzədɔɹ/, 4 syllables.