How Many People Are Named Cathlyn?
An estimated 284 people in the United States have the first name Cathlyn. It is almost exclusively a female name. The average bearer is 50 years old, and Cathlyn peaked in popularity in 1953 with 18 births that year.
Below you will find a full statistical profile of Cathlyn 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 Cathlyn paired with any surname.
Estimated Living Americans
284
About 1 in 1,206,881 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
100.0% confidence
Average Age
50
years old
Peak Year
1953
18 births
Total Registered
361
since 1880
Gender Distribution for Cathlyn
Cathlyn is almost exclusively a female name. Out of 361 total births registered, 100.0% were female.
Cathlyn as a female name
Ranked #8,525 in 2024
12 female births in 2024
Peak: 1953 (18 births)
Cathlyn: Popularity Over Time
SSA records for Cathlyn span from the 1920s to the 2020s, covering 10 decades of naming data. The most popular decade for this name was the 1950s, when 105 babies were registered. Cathlyn has declined significantly from its peak in the 1950s. Recent registrations are a fraction of what they were at the name's height.
Cathlyn by Decade
How has Cathlyn 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.
Cathlyn by State
Cathlyn + Last Name Combinations
How many people share a full name with Cathlyn as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Cathlyn
Other first names starting with C with a similar number of bearers.
Cathlyn: Questions and Answers
How many people in the U.S. are named Cathlyn?
We estimate approximately 284 people named Cathlyn 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 1,206,881 Americans share this first name.
Is Cathlyn a common name?
Cathlyn is classified as "Very Rare" and is more popular than 78.6% of all first names in the SSA database. A total of 361 births have been registered with this name since 1880.
When was Cathlyn most popular?
Cathlyn reached peak popularity in 1953, when 18 babies were given this name. The average age of a living person named Cathlyn is approximately 50 years old, reflecting when the name was most commonly given.
Is Cathlyn a female name?
Cathlyn is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Cathlyn Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Cathlyn Smith, Cathlyn Johnson, Cathlyn 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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