How Many People Are Named Willliam?
An estimated 245 people in the United States have the first name Willliam. It is almost exclusively a male name. The average bearer is 32 years old, and Willliam peaked in popularity in 2006 with 12 births that year.
Below you will find a full statistical profile of Willliam 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 Willliam paired with any surname.
Estimated Living Americans
245
About 1 in 1,398,997 people in the U.S.
Rarity
Very Rare
Predicted Gender
Male
100.0% confidence
Average Age
32
years old
Peak Year
2006
12 births
Total Registered
266
since 1880
Gender Distribution for Willliam
Willliam is almost exclusively a male name. Out of 266 total births registered, 100.0% were male.
Willliam as a male name
Ranked #12,061 in 2021
6 male births in 2021
Peak: 2006 (12 births)
Willliam: Popularity Over Time
SSA records for Willliam span from the 1920s to the 2020s, covering 10 decades of naming data. The most popular decade for this name was the 2000s, when 65 babies were registered. Willliam has declined significantly from its peak in the 2000s. Recent registrations are a fraction of what they were at the name's height.
Willliam by Decade
How has Willliam 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.
Willliam + Last Name Combinations
How many people share a full name with Willliam as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Willliam
Other first names starting with W with a similar number of bearers.
Willliam: Questions and Answers
How many people in the U.S. are named Willliam?
We estimate approximately 245 people named Willliam 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 1,398,997 Americans share this first name.
Is Willliam a common name?
Willliam is classified as "Very Rare" and is more popular than 76.8% of all first names in the SSA database. A total of 266 births have been registered with this name since 1880.
When was Willliam most popular?
Willliam reached peak popularity in 2006, when 12 babies were given this name. The average age of a living person named Willliam is approximately 32 years old, reflecting when the name was most commonly given.
Is Willliam a male name?
Willliam is predominantly male. 100.0% of people with this name are male. See the gender breakdown above for full details.
How many Willliam Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Willliam Smith, Willliam Johnson, Willliam 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.
Search for a full name combination
How Many of Me