Unisex name · since 1880
Llewellyn
Llewellyn has 3,414 recorded births since 1880 in federal Social Security data, most heavily in 1916 -- full year-by-year trend, decade aggregates, and state rankings follow.
- #2,324 of 45,481
- all-time among boys
- #5,610 of 13,930
- 2025 SSA year
- 3,414
- born since 1880
- 1920s
- peak decade
Yes -- Llewellyn is the #5610 most popular unisex name in the U.S. today, with 3,414 recorded since 1880.
According to the U.S. Social Security Administration, Llewellyn has been recorded 3,414 times among boys since 1880, currently ranked #5610 nationally and more common than 60% of boys, with its heaviest use in the 1920s. This profile covers year-by-year birth trends, decade totals, and state-level distribution, all derived directly from SSA birth-registration files spanning 1880 to 2025.
- #2,324 of 45,481 all-time among boys
- #5,610 of 13,930 2025 SSA year
- 3,414 born since 1880
- 1920s peak decade
Data updated Aug 2026
The verdict
According to the U.S. Social Security Administration, Llewellyn ranks #2,324 of 45,481 boys' names by all-time recorded births (highest first) and #5,610 of 13,930 among boys' names in 2025. 3,414 born since 1880, peaking in the 1920s.
- #2,324 of 45,481
- all-time among boys
- #5,610 of 13,930
- 2025 SSA year
- 3,414
- born since 1880
- 1920s
- peak decade
Llewellyn's 3,414 recorded births place it above 94.88% of the 45,481 boys names in the full SSA archive.
13 jurisdictions carry state-level records, led by Pennsylvania.
How Llewellyn compares
3,414 Top 16% higher than 84% of 13,930 names currently given to boys
Based on all-time total births among currently-ranked boys names. Names with fewer occurrences are grouped into wider buckets on the right.
Source U.S. Social Security Administration, national baby name data
How the numbers stack up
Llewellyn's all-time total is 9x the median boys name, and Liam still leads by a wide margin.
| Metric | Llewellyn | Median boys name (Takari) | #1 boys name (Liam) |
|---|---|---|---|
| All-time total births | 3,414 | 369 | 358,536 |
| Peak-year births | 69 | 34 | 22,252 |
Llewellyn's usage pattern, beyond the headline number
Splitting Llewellyn's full recorded timeline at 1952, 39% of its total births fall in the more recent half of the record versus 61% in the earlier half -- the name was more prevalent in its earlier era than it is today. Its quietest year on record was 1889, with just 5 recorded births -- worth weighing against the 1916 peak of 69 to see the full range of the name's swing in popularity.
Llewellyn popularity over time - boys
Annual U.S. births registered with the Social Security Administration · 1880–2025
- Peak year (1916)
- 69
- Annual births at peak, across 146 years of records
Llewellyn popularity over time - girls
341 total births recorded since 1906 (Llewellyn as girls' name)
Llewellyn by decade
1920s is the heaviest window (566 births, 17% of the file).
1920s was Llewellyn's strongest decade.
566 babies received the name during that ten-year window, about 17% of all-time use.
Llewellyn births by decade
Total births in each ten-year window
- 1880s 72
1880s
72 births
- 1890s 84
1890s
84 births
- 1900s 64
1900s
64 births
- 1910s
1910s
452 births
- 1920s
1920s
566 births
- 1930s
1930s
407 births
- 1940s
1940s
369 births
- 1950s
1950s
421 births
- 1960s
1960s
326 births
- 1970s
1970s
232 births
- 1980s 159
1980s
159 births
- 1990s 73
1990s
73 births
- 2000s 36
2000s
36 births
- 2010s 81
2010s
81 births
- 2020s 72
2020s
72 births
What this shows Peak: 1920s at 566 births (17% of all-time use).
How Llewellyn compares to similarly-sized names
Years in SSA records vs. share of all-time use concentrated in the single peak year, among 15 boys names closest to Llewellyn's total volume
Llewellyn by state
Where Llewellyn concentrates geographically, total births since 1880
| Rank | State | Visual share | Births | Share of total |
|---|---|---|---|---|
| #1 | Pennsylvania | | 253 | 7.4% |
| #2 | New York | | 102 | 3.0% |
| #3 | Maine | | 61 | 1.8% |
| #4 | Michigan | | 29 | 0.8% |
| #5 | Wisconsin | | 29 | 0.8% |
| #6 | California | | 26 | 0.8% |
| #7 | Virginia | | 25 | 0.7% |
| #8 | Hawaii | | 22 | 0.6% |
253 of 3,414 births nationwide. Compared to a flat distribution across 13 reporting states.
Llewellyn appears in 13 states. Explore state details →
Frequently Asked Questions
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Where does Llewellyn sit in the SSA name archive? ▼
When was Llewellyn most popular? ▼
Where is Llewellyn most popular? ▼
Is Llewellyn a unisex name? ▼
How long has the name Llewellyn been used? ▼
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What to do with Llewellyn's data
- Llewellyn's decade-level peak was the 1920s (566 total births); usage has since declined to 72 in the 2020s -- if you're weighing a "classic revival" angle, the trend line argues against it.
- Pennsylvania records the most Llewellyns (253 births) -- see the full state breakdown if geography matters to your decision. Pennsylvania names
Figures reflect SSA-reported births only; see the methodology above for the privacy-suppression floor.
Keep exploring Llewellyn
Nearby Names Like Llewellyn
Names with a similar sound, spelling, or feel to Llewellyn
Compare Llewellyn side by side: Llewellyn vs Lleyton Llewellyn vs Llewyn Llewellyn vs Llewelyn
Related Names
Names with a similar popularity rank to Llewellyn
Nationwide names with similar peak year or record span
Two nationwide peer axes for Llewellyn: closest SSA peak year, and closest first→latest record span. Distinct from the spelling and current-rank neighborhoods above.
Similar peak year (~1916)
Similar record span (~145 yrs)
Peak year is the single SSA year with the most births for that name; record span is first-to-latest year in the national files, not a recommendation or shared origin claim.
Data Sources
Data as of August 2026. Source: U.S. Social Security Administration (SSA).
According to the Social Security Administration, this profile draws directly from the agency's public-use baby-name files (updated June 2026). See our methodology for the full extraction, aggregation, and privacy-suppression rules.
Primary: Source: U.S. Social Security Administration, Baby Names from Social Security Card Applications, National Data, 1880–2025 (ssa.gov/oact/babynames).
State-level: Source: U.S. Social Security Administration, Baby Names, State-Level Files (namesbystate.zip).
Name Almanac is rendered directly from the Social Security Administration's public baby-name files, no number is typed in by an editor. This profile for Llewellyn draws directly on SSA national and state-level files, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.