Llewellyn Boy & girl
How popular is Llewellyn?
#5,606 boy name in 2025
16 baby boys were named Llewellyn in the US in 2025, making it the 5606th most popular boy name. Another 11 girls got the name (#8,858 for girls).
Llewellyn popularity over time
Boys Girls
| Rank in 2025 | #5,606 for boys (▲ 858 from 2024) |
|---|---|
| Babies in 2025 | 16 boys, 11 girls |
| 10-year trend | Rising fast (+100% babies vs 2015) |
| Earlier ranks | #8,739 in 2015, #6,292 in 2020 |
| Peak year | 1916 (69 boys) |
| Highest rank | #576 in 1882 |
| First recorded | 1880 |
| Boys vs girls (last 10 years) | 68% boys, 32% girls |
| Chance a classmate shares it | 0.0% in a class of 25 kids born in 2025 |
Llewellyn counting every spelling
Social Security counts each spelling as its own name. Adding together the spellings that sound alike, the Llewellyn family of names ranked #2,725 for boys in 2025 (#2,554 the year before), with 33 babies in all.
| Spelling | Boys in 2025 | Share |
|---|---|---|
| Llewellyn | 16 | 48% |
| Llewelyn | 17 | 52% |
Spellings are grouped by how they sound, using our own rules, so a few groupings may not match how your family says the name.
Llewellyn by decade
| Decade | Baby boys | Best rank |
|---|---|---|
| 1880s | 72 | #576 |
| 1890s | 84 | #594 |
| 1900s | 64 | #709 |
| 1910s | 452 | #707 |
| 1920s | 566 | #803 |
| 1930s | 407 | #906 |
| 1940s | 369 | #935 |
| 1950s | 421 | #1,055 |
| 1960s | 326 | #1,130 |
| 1970s | 232 | #1,508 |
| 1980s | 159 | #2,425 |
| 1990s | 73 | #4,161 |
| 2000s | 36 | #6,309 |
| 2010s | 81 | #7,081 |
| 2020s | 72 | #5,606 |
Boy names about as popular as Llewellyn
Questions
- Is Llewellyn a boy or girl name?
- Llewellyn is used for both. Over the last 10 years, 68% of babies named Llewellyn were boys and 32% were girls.
- How popular is the name Llewellyn?
- 16 baby boys were named Llewellyn in the US in 2025, making it the 5606th most popular boy name. Another 11 girls got the name (#8,858 for girls).
- When was Llewellyn most popular?
- Llewellyn peaked in 1916, when 69 boys were given the name. Its highest rank was #576 in 1882.
- How many people are named Llewellyn?
- 3,755 babies have been named Llewellyn in the US since 1880. We estimate about 1,554 of them are alive in 2026, with a median age of 61.
Source: Social Security Administration baby name data, 1880 to 2025 (names given to at least 5 babies of a sex in a year). Living-people and median-age figures are our estimates using US life tables. How we calculate.