How Many People Are Named Lyllian?
An estimated 612 people in the United States have the first name Lyllian. It is almost exclusively a female name. The average bearer is 15 years old, and Lyllian peaked in popularity in 2009 with 45 births that year.
Below you will find a full statistical profile of Lyllian 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 Lyllian paired with any surname.
Estimated Living Americans
612
About 1 in 560,056 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
100.0% confidence
Average Age
15
years old
Peak Year
2009
45 births
Total Registered
630
since 1880
Gender Distribution for Lyllian
Lyllian is almost exclusively a female name. Out of 630 total births registered, 100.0% were female.
Lyllian as a female name
Ranked #12,920 in 2023
7 female births in 2023
Peak: 2009 (45 births)
Lyllian: Popularity Over Time
SSA records for Lyllian span from the 1920s to the 2020s, covering 5 decades of naming data. The most popular decade for this name was the 2010s, when 304 babies were registered. Lyllian has declined significantly from its peak in the 2010s. Recent registrations are a fraction of what they were at the name's height.
Lyllian by Decade
How has Lyllian 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.
Lyllian + Last Name Combinations
How many people share a full name with Lyllian as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Lyllian
Other first names starting with L with a similar number of bearers.
Lyllian: Questions and Answers
How many people in the U.S. are named Lyllian?
We estimate approximately 612 people named Lyllian 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 560,056 Americans share this first name.
Is Lyllian a common name?
Lyllian is classified as "Very Rare" and is more popular than 86.4% of all first names in the SSA database. A total of 630 births have been registered with this name since 1880.
When was Lyllian most popular?
Lyllian reached peak popularity in 2009, when 45 babies were given this name. The average age of a living person named Lyllian is approximately 15 years old, reflecting when the name was most commonly given.
Is Lyllian a female name?
Lyllian is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Lyllian Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Lyllian Smith, Lyllian Johnson, Lyllian 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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