How Many People Are Named Onis?
An estimated 46 people in the United States have the first name Onis. It is predominantly male (98.1%). The average bearer is 80 years old, and Onis peaked in popularity in 1919 with 15 births that year.
Below you will find a full statistical profile of Onis 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 Onis paired with any surname.
Key Insights
- With an average bearer age of 80, Onis is a vintage name most associated with earlier generations. Most living bearers were born before 1956.
- Onis is exceptionally rare. Fewer than 100 people with this name are estimated to be alive in the U.S. today.
Estimated Living Americans
46
About 1 in 7,451,181 people in the U.S.
Rarity
Very Rare
Predicted Gender
Male
98.1% confidence
Average Age
80
years old
Peak Year
1919
15 births
Total Registered
268
since 1880
Gender Distribution for Onis
Onis is predominantly male (98.1%), though 5 female births have been registered. It functions as a unisex name for a small percentage of bearers.
Onis as a male name
Ranked #2,862 in 1968
10 male births in 1968
Peak: 1919 (15 births)
Onis as a female name
Ranked #5,682 in 1921
5 female births in 1921
Peak: 1921 (5 births)
Onis: Popularity Over Time
SSA records for Onis span from the 1910s to the 1960s, covering 6 decades of naming data. The most popular decade for this name was the 1920s, when 87 babies were registered. Onis has declined significantly from its peak in the 1920s. Recent registrations are a fraction of what they were at the name's height.
Onis by Decade
How has Onis 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.
Onis + Last Name Combinations
How many people share a full name with Onis as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Onis
Other first names starting with O with a similar number of bearers.
Onis: Questions and Answers
How many people in the U.S. are named Onis?
We estimate approximately 46 people named Onis 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 7,451,181 Americans share this first name.
Is Onis a common name?
Onis is classified as "Very Rare" and is more popular than 53.1% of all first names in the SSA database. A total of 268 births have been registered with this name since 1880.
When was Onis most popular?
Onis reached peak popularity in 1919, when 15 babies were given this name. The average age of a living person named Onis is approximately 80 years old, reflecting when the name was most commonly given.
Is Onis a male name?
Onis is predominantly male. 98.1% of people with this name are male. See the gender breakdown above for full details.
How many Onis Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Onis Smith, Onis Johnson, Onis 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 0 life tables broken down by sex. The U.S. population figure (342,754,338) is from the Census Bureau estimate. Full methodology.
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