How Many People Are Named Trilby?
An estimated 225 people in the United States have the first name Trilby. It is almost exclusively a female name. The average bearer is 61 years old, and Trilby peaked in popularity in 1925 with 22 births that year.
Below you will find a full statistical profile of Trilby 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 Trilby paired with any surname.
Estimated Living Americans
225
About 1 in 1,523,353 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
100.0% confidence
Average Age
61
years old
Peak Year
1925
22 births
Total Registered
567
since 1880
Gender Distribution for Trilby
Trilby is almost exclusively a female name. Out of 567 total births registered, 100.0% were female.
Trilby as a female name
Ranked #16,835 in 2010
6 female births in 2010
Peak: 1925 (22 births)
Trilby: Popularity Over Time
SSA records for Trilby span from the 1890s to the 2010s, covering 12 decades of naming data. The most popular decade for this name was the 1920s, when 116 babies were registered. Trilby has declined significantly from its peak in the 1920s. Recent registrations are a fraction of what they were at the name's height.
Trilby by Decade
How has Trilby 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.
Trilby + Last Name Combinations
How many people share a full name with Trilby as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Trilby
Other first names starting with T with a similar number of bearers.
Trilby: Questions and Answers
How many people in the U.S. are named Trilby?
We estimate approximately 225 people named Trilby 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 1,523,353 Americans share this first name.
Is Trilby a common name?
Trilby is classified as "Very Rare" and is more popular than 75.7% of all first names in the SSA database. A total of 567 births have been registered with this name since 1880.
When was Trilby most popular?
Trilby reached peak popularity in 1925, when 22 babies were given this name. The average age of a living person named Trilby is approximately 61 years old, reflecting when the name was most commonly given.
Is Trilby a female name?
Trilby is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Trilby Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Trilby Smith, Trilby Johnson, Trilby 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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