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Name Lineage

    The first name Guillermo

    A boy’s name.

    3 syllables Male Also a surname

    Popularity

    Babies registered in England and Wales, 1996–2025

    Guillermo last appeared in the official list in 2023, given to 3 boys. It peaked in 2019, with 8 births (#2,488).

    0510 1996200020052010201520202025
    55
    babies named Guillermo, 1996–2025
    #4,991
    rank in 2023
    2019
    peak year

    Office for National Statistics; years with fewer than three births are not published and show as zero. Compare Guillermo with other names.

    Popularity in the United States

    Babies named Guillermo at birth, 1880–2025

    In 2025, 264 boys born in the United States were named Guillermo, the 902nd most popular boys’ name that year. It was used most in 1998, when 693 were.

    0350700 188018851890189519001905191019151920192519301935194019451950195519601965197019751980198519901995200020052010201520202025
    32,148
    babies named Guillermo since 1880
    #902
    rank in 2025
    1998
    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 Guillermo

    63 on Wikidata, most written-about first

    • Guillermo Lasso
      55th President of Ecuador from 2021 to 2023
    • Guillermo Stábile
      Argentine football player and manager, 1905–1966
    • Guillermo Vilas
      Argentine tennis player, born 1952
    • Luis Guillermo Solís
      Costa Rican 47th president, born 1958
    • Guillermo Coria
      Argentine tennis player, born 1982
    • Guillermo Cabrera Infante
      Cuban writer, 1929–2005
    • Guillermo Cañas
      Argentine tennis player, born 1977
    • Guillermo Subiabre
      Chilean footballer (1903-1964)
    • Guillermo Maripán
      Chilean association football player, born 1994
    • Guillermo Rigondeaux
      Cuban boxer, born 1980
    • Guillermo Fariñas
      Cuban dissident, born 1962
    • Guillermo Barros Schelotto
      Argentine footballer and manager, born 1973

    Questions

    How popular is the name Guillermo?
    In 2023, 3 boys born in England and Wales were named Guillermo, ranking 4,991st. Its peak was 2019, with 8 births.
    Is Guillermo a boy's or a girl's name?
    Mostly a boy's name: 100% of the 32,148 US babies named Guillermo since 1880 were boys.
    When was Guillermo most popular?
    1998 in the United States, when 693 babies were named Guillermo, its highest rank at 369th.
    Is Guillermo also a surname?
    Yes. Guillermo is used as a surname as well as a first name; its surname page has the origin and how many people carry it.