How Many People Are Named Onesimus?
An estimated 49 people in the United States have the first name Onesimus. It is almost exclusively a male name. The average bearer is 20 years old, and Onesimus peaked in popularity in 1982 with 9 births that year.
Below you will find a full statistical profile of Onesimus 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 Onesimus paired with any surname.
Key Insights
- Onesimus is exceptionally rare. Fewer than 100 people with this name are estimated to be alive in the U.S. today.
Estimated Living Americans
49
About 1 in 6,994,986 people in the U.S.
Rarity
Very Rare
Predicted Gender
Male
100.0% confidence
Average Age
20
years old
Peak Year
1982
9 births
Total Registered
50
since 1880
Gender Distribution for Onesimus
Onesimus is almost exclusively a male name. Out of 50 total births registered, 100.0% were male.
Onesimus as a male name
Ranked #10,307 in 2020
7 male births in 2020
Peak: 1982 (9 births)
Onesimus: Popularity Over Time
SSA records for Onesimus span from the 1980s to the 2020s, covering 5 decades of naming data. The most popular decade for this name was the 2010s, when 18 babies were registered. While Onesimus is less common than at its peak in the 2010s, it remains a well-established name with steady registrations.
Onesimus by Decade
How has Onesimus 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.
Onesimus + Last Name Combinations
How many people share a full name with Onesimus as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Onesimus
Other first names starting with O with a similar number of bearers.
Onesimus: Questions and Answers
How many people in the U.S. are named Onesimus?
We estimate approximately 49 people named Onesimus 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 6,994,986 Americans share this first name.
Is Onesimus a common name?
Onesimus is classified as "Very Rare" and is more popular than 54% of all first names in the SSA database. A total of 50 births have been registered with this name since 1880.
When was Onesimus most popular?
Onesimus reached peak popularity in 1982, when 9 babies were given this name. The average age of a living person named Onesimus is approximately 20 years old, reflecting when the name was most commonly given.
Is Onesimus a male name?
Onesimus is predominantly male. 100.0% of people with this name are male. See the gender breakdown above for full details.
How many Onesimus Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Onesimus Smith, Onesimus Johnson, Onesimus 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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