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Name Lineage

    The first name Llewellyn

    A boy’s name from Welsh.

    Pronounced /ləˈwɛlɪn/ 3 syllables Male Also a surname

    Meaning and origin

    Welsh origin

    From Welsh Llywelyn.

    From Wiktionary (CC BY-SA 4.0).

    Popularity

    Babies registered in England and Wales, 1996–2025

    In 2025, 5 boys were named Llewellyn, making it the 3,684th most popular boys’ name. It peaked in 2004, with 17 births (#1,110).

    01020 1996200020052010201520202025
    255
    babies named Llewellyn, 1996–2025
    #3,684
    rank in 2025
    2004
    peak year

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

    Popularity in the United States

    Babies named Llewellyn at birth, 1880–2025

    In 2025, 16 boys born in the United States were named Llewellyn, the 5,749th most popular boys’ name that year. It was used most in 1916, when 69 were.

    03570 188018851890189519001905191019151920192519301935194019451950195519601965197019751980198519901995200020052010201520202025
    GirlsBoys
    3,755
    babies named Llewellyn since 1880
    #5,749
    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.

    Nicknames and spellings

    Other spellings and forms

    Famous people named Llewellyn

    5 on Wikidata, most written-about first

    • Llewellyn Thomas
      British physicist and mathematician (1903-1992)
    • Llewellyn Thompson
      American diplomat (1904–1972)
    • Llewellyn Evans
      Field hockey player (1876-1951)
    • Llewellyn Powers
      American politician (1836–1908)
    • Michael Rutter
      British psychiatrist (1933–2021)

    More Welsh boys’ names

    All 78 names of Welsh origin

    Questions

    What does the name Llewellyn mean?
    From Welsh Llywelyn.
    What is the origin of the name Llewellyn?
    From Welsh Llywelyn.
    How popular is the name Llewellyn?
    In 2025, 5 boys born in England and Wales were named Llewellyn, ranking 3,684th. Its peak was 2004, with 17 births.
    Is Llewellyn a boy's or a girl's name?
    Both. Of the 3,755 US babies named Llewellyn since 1880, 9% were girls and 91% boys.
    When was Llewellyn most popular?
    1916 in the United States, when 69 babies were named Llewellyn, its highest rank at 729th.
    How do you pronounce Llewellyn?
    Llewellyn is /ləˈwɛlɪn/, 3 syllables.
    What are other spellings of Llewellyn?
    Lewelling, Llewelyn and Flewellen.
    Is Llewellyn also a surname?
    Yes. Llewellyn is used as a surname as well as a first name; its surname page has the origin and how many people carry it.