How Many People Are Named Llewellyn?
An estimated 1,603 people in the United States have the first name Llewellyn. It is predominantly male (91.1%). The average bearer is 57 years old, and Llewellyn peaked in popularity in 1918 with 79 births that year.
Below you will find a full statistical profile of Llewellyn as a first name in the United States, including gender data, a year-by-year popularity timeline going back to 1880, a decade breakdown, and state-by-state birth registrations. You can also check how many people share the full name Llewellyn paired with any surname.
Estimated Living Americans
1,603
About 1 in 213,821 people in the U.S.
Rarity
Rare
Predicted Gender
Male
91.1% confidence
Average Age
57
years old
Peak Year
1918
79 births
Total Registered
3,728
since 1880
Gender Distribution for Llewellyn
Llewellyn is predominantly male (91.1%), though 330 female births have been registered. It functions as a unisex name for a small percentage of bearers.
Llewellyn as a male name
Ranked #6,663 in 2024
13 male births in 2024
Peak: 1916 (69 births)
Llewellyn as a female name
Ranked #14,482 in 2024
6 female births in 2024
Peak: 1924 (17 births)
Llewellyn: Popularity Over Time
SSA records for Llewellyn span from the 1880s to the 2020s, covering 15 decades of naming data. The most popular decade for this name was the 1920s, when 638 babies were registered. Llewellyn has declined significantly from its peak in the 1920s. Recent registrations are a fraction of what they were at the name's height.
Llewellyn by Decade
How has Llewellyn tracked across different eras? The table below groups all SSA birth registrations into 10-year periods, with separate male and female counts. The colored bar shows each decade's share relative to the peak.
Llewellyn by State
Birth registrations for Llewellyn span all 13 states and territories in the SSA database. The highest counts are in Pennsylvania, New York, Maine. The lowest are in North Carolina, Massachusetts, Louisiana. On average, about 45 Llewellyns were registered per state.
Llewellyn + Last Name Combinations
How many people share a full name with Llewellyn as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Llewellyn
Other first names starting with L with a similar number of bearers.
Llewellyn: Questions and Answers
How many people in the U.S. are named Llewellyn?
We estimate approximately 1,603 people named Llewellyn are alive in the United States today. This is based on SSA birth records from 1880 to 2024, adjusted for mortality using CDC life tables. About 1 in 213,821 Americans share this first name.
Is Llewellyn a common name?
Llewellyn is classified as "Rare" and is more popular than 92.7% of all first names in the SSA database. A total of 3,728 births have been registered with this name since 1880.
When was Llewellyn most popular?
Llewellyn reached peak popularity in 1918, when 79 babies were given this name. The average age of a living person named Llewellyn is approximately 57 years old, reflecting when the name was most commonly given.
Is Llewellyn a male name?
Llewellyn is predominantly male. 91.1% of people with this name are male. See the gender breakdown above for full details.
How many Llewellyn Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Llewellyn Smith, Llewellyn Johnson, Llewellyn Williams. You can also search any combination on our homepage.
Where does this data come from?
Our estimates use Social Security Administration birth records (1880 to 2024), adjusted for survival using CDC 2023 life tables broken down by sex. The U.S. population figure (342,754,338) is from the Census Bureau's July 2025 estimate. Full methodology.
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