How Many People Are Named Onathan?
An estimated 45 people in the United States have the first name Onathan. It is almost exclusively a male name. The average bearer is 41 years old, and Onathan peaked in popularity in 1988 with 12 births that year.
Below you will find a full statistical profile of Onathan 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 Onathan paired with any surname.
Key Insights
- Onathan is exceptionally rare. Fewer than 100 people with this name are estimated to be alive in the U.S. today.
Estimated Living Americans
45
About 1 in 7,616,763 people in the U.S.
Rarity
Very Rare
Predicted Gender
Male
100.0% confidence
Average Age
41
years old
Peak Year
1988
12 births
Total Registered
47
since 1880
Gender Distribution for Onathan
Onathan is almost exclusively a male name. Out of 47 total births registered, 100.0% were male.
Onathan as a male name
Ranked #5,480 in 1989
9 male births in 1989
Peak: 1988 (12 births)
Onathan: Popularity Over Time
SSA records for Onathan span from the 1970s to the 1980s, covering 2 decades of naming data. The most popular decade for this name was the 1980s, when 37 babies were registered. Onathan remains highly popular today, with recent registration numbers near its historical peak.
Onathan by Decade
How has Onathan 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.
Onathan + Last Name Combinations
How many people share a full name with Onathan as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Onathan
Other first names starting with O with a similar number of bearers.
Onathan: Questions and Answers
How many people in the U.S. are named Onathan?
We estimate approximately 45 people named Onathan 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 7,616,763 Americans share this first name.
Is Onathan a common name?
Onathan is classified as "Very Rare" and is more popular than 52.7% of all first names in the SSA database. A total of 47 births have been registered with this name since 1880.
When was Onathan most popular?
Onathan reached peak popularity in 1988, when 12 babies were given this name. The average age of a living person named Onathan is approximately 41 years old, reflecting when the name was most commonly given.
Is Onathan a male name?
Onathan is predominantly male. 100.0% of people with this name are male. See the gender breakdown above for full details.
How many Onathan Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Onathan Smith, Onathan Johnson, Onathan 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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