How Many People Are Named Wiiliam?
An estimated 25 people in the United States have the first name Wiiliam. It is almost exclusively a male name. The average bearer is 26 years old, and Wiiliam peaked in popularity in 1997 with 8 births that year.
Below you will find a full statistical profile of Wiiliam 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 Wiiliam paired with any surname.
Key Insights
- Wiiliam is exceptionally rare. Fewer than 100 people with this name are estimated to be alive in the U.S. today.
Estimated Living Americans
25
About 1 in 13,710,174 people in the U.S.
Rarity
Very Rare
Predicted Gender
Male
100.0% confidence
Average Age
26
years old
Peak Year
1997
8 births
Total Registered
25
since 1880
Gender Distribution for Wiiliam
Wiiliam is almost exclusively a male name. Out of 25 total births registered, 100.0% were male.
Wiiliam as a male name
Ranked #10,921 in 2009
7 male births in 2009
Peak: 1997 (8 births)
Wiiliam: Popularity Over Time
SSA records for Wiiliam span from the 1980s to the 2000s, covering 3 decades of naming data. The most popular decade for this name was the 2000s, when 12 babies were registered. Wiiliam remains highly popular today, with recent registration numbers near its historical peak.
Wiiliam by Decade
How has Wiiliam 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.
Wiiliam + Last Name Combinations
How many people share a full name with Wiiliam as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Wiiliam
Other first names starting with W with a similar number of bearers.
Wiiliam: Questions and Answers
How many people in the U.S. are named Wiiliam?
We estimate approximately 25 people named Wiiliam 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 13,710,174 Americans share this first name.
Is Wiiliam a common name?
Wiiliam is classified as "Very Rare" and is more popular than 43.6% of all first names in the SSA database. A total of 25 births have been registered with this name since 1880.
When was Wiiliam most popular?
Wiiliam reached peak popularity in 1997, when 8 babies were given this name. The average age of a living person named Wiiliam is approximately 26 years old, reflecting when the name was most commonly given.
Is Wiiliam a male name?
Wiiliam is predominantly male. 100.0% of people with this name are male. See the gender breakdown above for full details.
How many Wiiliam Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Wiiliam Smith, Wiiliam Johnson, Wiiliam 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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