How Many People Are Named Wataru?
An estimated 79 people in the United States have the first name Wataru. It is almost exclusively a male name. The average bearer is 31 years old, and Wataru peaked in popularity in 1919 with 15 births that year.
Below you will find a full statistical profile of Wataru 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 Wataru paired with any surname.
Key Insights
- Wataru is exceptionally rare. Fewer than 100 people with this name are estimated to be alive in the U.S. today.
Estimated Living Americans
79
About 1 in 4,338,663 people in the U.S.
Rarity
Very Rare
Predicted Gender
Male
100.0% confidence
Average Age
31
years old
Peak Year
1919
15 births
Total Registered
142
since 1880
Gender Distribution for Wataru
Wataru is almost exclusively a male name. Out of 142 total births registered, 100.0% were male.
Wataru as a male name
Ranked #13,938 in 2015
5 male births in 2015
Peak: 1919 (15 births)
Wataru: Popularity Over Time
SSA records for Wataru span from the 1910s to the 2010s, covering 7 decades of naming data. The most popular decade for this name was the 1990s, when 50 babies were registered. Wataru has declined significantly from its peak in the 1990s. Recent registrations are a fraction of what they were at the name's height.
Wataru by Decade
How has Wataru 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.
Wataru by State
Wataru + Last Name Combinations
How many people share a full name with Wataru as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Wataru
Other first names starting with W with a similar number of bearers.
Wataru: Questions and Answers
How many people in the U.S. are named Wataru?
We estimate approximately 79 people named Wataru 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 4,338,663 Americans share this first name.
Is Wataru a common name?
Wataru is classified as "Very Rare" and is more popular than 61.1% of all first names in the SSA database. A total of 142 births have been registered with this name since 1880.
When was Wataru most popular?
Wataru reached peak popularity in 1919, when 15 babies were given this name. The average age of a living person named Wataru is approximately 31 years old, reflecting when the name was most commonly given.
Is Wataru a male name?
Wataru is predominantly male. 100.0% of people with this name are male. See the gender breakdown above for full details.
How many Wataru Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Wataru Smith, Wataru Johnson, Wataru 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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