How Many People Are Named Onan?
An estimated 36 people in the United States have the first name Onan. It is almost exclusively a male name. The average bearer is 8 years old, and Onan peaked in popularity in 2024 with 10 births that year.
Below you will find a full statistical profile of Onan 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 Onan paired with any surname.
Key Insights
- Onan is exceptionally rare. Fewer than 100 people with this name are estimated to be alive in the U.S. today.
Estimated Living Americans
36
About 1 in 9,520,954 people in the U.S.
Rarity
Very Rare
Predicted Gender
Male
100.0% confidence
Average Age
8
years old
Peak Year
2024
10 births
Total Registered
43
since 1880
Gender Distribution for Onan
Onan is almost exclusively a male name. Out of 43 total births registered, 100.0% were male.
Onan as a male name
Ranked #8,131 in 2024
10 male births in 2024
Peak: 2024 (10 births)
Onan: Popularity Over Time
SSA records for Onan span from the 1920s to the 2020s, covering 4 decades of naming data. The most popular decade for this name was the 2020s, when 24 babies were registered. Onan remains highly popular today, with recent registration numbers near its historical peak.
Onan by Decade
How has Onan 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.
Onan + Last Name Combinations
How many people share a full name with Onan as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Onan
Other first names starting with O with a similar number of bearers.
Onan: Questions and Answers
How many people in the U.S. are named Onan?
We estimate approximately 36 people named Onan 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 9,520,954 Americans share this first name.
Is Onan a common name?
Onan is classified as "Very Rare" and is more popular than 49.3% of all first names in the SSA database. A total of 43 births have been registered with this name since 1880.
When was Onan most popular?
Onan reached peak popularity in 2024, when 10 babies were given this name. The average age of a living person named Onan is approximately 8 years old, reflecting when the name was most commonly given.
Is Onan a male name?
Onan is predominantly male. 100.0% of people with this name are male. See the gender breakdown above for full details.
How many Onan Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Onan Smith, Onan Johnson, Onan 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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