Llewelyn
Llewelyn was given to 17 boys in 2025, #5,514 among boys’ names; 188 Americans have been recorded with it since 1916 (Social Security Administration, published May 2026).
Girls and boys together; gaps are years SSA did not record (fewer than 5 births).
Births of Llewelyn by year: SSA national baby-name file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
What does Llewelyn mean?
Wiktionary, English section
Llewelyn is “a male given name from Welsh.”
From Welsh Llywelyn.
/ləˈwɛlɪn/
Meaning: Wiktionary, English section, as of Sep 25, 2026 (CC BY‑SA 4.0).
How popular is Llewelyn?
#5,514 among boys’ names, 2025
Llewelyn rose from #13,261 in 2015 to #5,514 in 2025 among boys’ names; its share of boys born rose from 2.6 to 10.0 per million.
24 babies in 2024, the peak
Llewelyn peaked in 2024, when 24 boys were given it, #4,388 among boys’ names. The 17 births of 2025 are 71% of that peak.
Births by sex.
| Year | Births | Rank | Per million boys |
|---|---|---|---|
| 2025 | 17 | #5,514 | 10.0 |
| 2024 | 24 | #4,388 | 13.9 |
| 2023 | 13 | #6,747 | 7.6 |
| 2022 | 13 | #6,689 | 7.4 |
| 2021 | 10 | #7,916 | 5.7 |
| 2020 | 6 | #11,435 | 3.5 |
| 2019 | 7 | #10,390 | 3.9 |
| 2018 | 6 | #11,595 | 3.3 |
| 2015 | 5 | #13,261 | 2.6 |
| 1978 | 5 | #6,388 | 3.0 |
Every recorded year (22)
| Year | Births | Rank | Per million boys |
|---|---|---|---|
| 1976 | 5 | #6,129 | 3.2 |
| 1975 | 5 | #5,968 | 3.2 |
| 1962 | 7 | #3,509 | 3.4 |
| 1959 | 5 | #4,330 | 2.3 |
| 1957 | 7 | #3,434 | 3.2 |
| 1955 | 5 | #4,176 | 2.4 |
| 1953 | 5 | #4,128 | 2.5 |
| 1929 | 6 | #3,787 | 5.6 |
| 1926 | 6 | #4,004 | 5.4 |
| 1921 | 8 | #3,380 | 7.3 |
| 1918 | 5 | #4,535 | 4.9 |
| 1916 | 8 | #3,071 | 9.0 |
Ranks and shares: boys’ names in each year’s SSA file; share of all boys SSA recorded that year.
Is Llewelyn a boy’s or a girl’s name?
Of the 188 Americans recorded as Llewelyn, 5% are girls and 95% boys. In 2025 it went to 17 boys; SSA lists no girls with it that year (fewer than 5, or none).
Years with fewer than 20 babies given the name are left blank.
Girls and boys named Llewelyn: the SSA national file counts each sex separately.
How many people are named Llewelyn, and how old are they?
An estimated 145 Americans named Llewelyn and born in the U.S. are alive in 2026 (77% of everyone recorded); the median is 5 years old and half are between 2 and 11. An estimate from SSA’s births and life tables, not a count.
The 2020 Census counted 243 people named Llewelyn (59 women and girls, 184 men and boys). SSA’s births carried forward to Census day, April 1, 2020, predict 63 born in the U.S. The Census count is 3.9 times that prediction. Possible reasons: the Census counts people born abroad, whom SSA’s files leave out, and it records the name people give, which SSA may have recorded under another spelling or as part of a compound name.
Living estimate: SSA births carried forward with the survival rates in SSA’s cohort life tables (2024 Trustees Report) for each birth year and sex. How the estimate is made. Count: Census Bureau, first names in the 2020 Census (released April 14, 2026; names reported 100 or more times, with the Bureau’s disclosure-avoidance adjustment).
Names spelled alike
Of these 3 names spelled alike, given to 4,282 babies since 1880, Llewelyn is the third most given (4.4% of them). In 2025 it was given to 17 of their 44 babies (39%), the second most given that year.
Spelled alike: names in the SSA national file with the same pattern of letters and sounds and at most two letters apart, and Wiktionary’s listed forms; births since 1880 and in 2025, and each name’s peak year, from the SSA national file, published May 8, 2026. Some are separate names, not spellings of one.
More about Llewelyn and names like it
- Compare Llewelyn and LlewellynBirths, ranks, peak and the living estimate side by side.
- The most given names of the 2020sLlewelyn peaked in 2024.
- Welsh namesWiktionary’s origin for Llewelyn: every such name, by how often it is given.
- The top names of 2024The year the most babies were named Llewelyn.
- The names of Generation AlphaMost people named Llewelyn alive today were born 2013-2025.
- Names starting with LMost given first.