Llewelyn
- US rank
- #5,399
- Syllables
- 3
- Peak
- #2,926 in 1916
17 babies were named Llewelyn in the US in 2025. It has climbed 5,206 places in five years.
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US births per million boys, 1916–2025
Similar names
Popularity: U.S. Social Security Administration (babies with 5+ births per year).
Did you know?
A few things about Llewelyn you might not know, from US birth records. Handy for convincing a partner, or a grandparent.
- How commonAbout 1 in every 100,000 baby boys born in the US in 2025 was named Llewelyn, 17 babies in all. In a typical school of 500 kids, your Llewelyn would very likely be the only one.
- HistoryLlewelyn first shows up in US birth records in 1916, the first year at least 5 babies got it. It has been in use for 109 years since.
- Best yearIts best year was 1916, when it reached #2,926.
- TrendLlewelyn has climbed 5,206 places in the US rankings over the last five years and now sits at #5,399. Fast risers like this often keep climbing, so expect to hear it more.
About the name Llewelyn
Llewelyn is a boy name of Celtic and Welsh origin. It has 8 letters and 3 syllables, starting with L and ending in “-lyn”. US birth records list Llewelyn for boys from 1916 to 2025, in 22 of those 110 years. Its best year was 1916, when it ranked #2,926 among boy names. In 2025 it ranked #5,399, with 17 babies.
Origin:Celtic namesWelsh names
| Decade | Babies per million | About 1 in |
|---|---|---|
| 1910s | 3.5 | 287,770 boys |
| 1920s | 1.8 | 546,448 boys |
| 1950s | 1.0 | 961,538 boys |
| 1960s | 0.3 | 2,941,176 boys |
| 1970s | 0.9 | 1,063,830 boys |
| 2010s | 1.0 | 1,020,408 boys |
| 2020s | 8.0 | 124,740 boys |
Other spellings of Llewelyn
More Celtic boy names
- Unisex name: Owen · well-born
- Unisex name: Logan · little hollow
- Unisex name: Rowan · little red-haired one
- Unisex name: Nolan · descendant of Nuallán
- Unisex name: Cameron · crooked nose
- Boy name: Ian · God is gracious
- Unisex name: Gael · a Gael
- Boy name: Arthur · possibly bear
Questions about the name Llewelyn
What is the origin of the name Llewelyn?
Llewelyn has Celtic, Welsh roots in our records. Other Celtic names include Owen, Logan, Rowan.
Is Llewelyn a boy or girl name?
Llewelyn is a boy name.
How popular is the name Llewelyn?
Llewelyn ranked #5,399 for US boys in 2025, given to 17 babies. Its best year was 1916 (#2,926).