How Many People Are Named Unknown Williams?
There are approximately 81 people named Unknown Williams living in the United States today. That makes this name combination rare, occurring at a rate of about 1 in 4,231,535 Americans.
This estimate combines SSA birth records for the first name Unknown with Census Bureau frequency data for the surname Williams. Below you will find a breakdown of both names, including popularity trends, gender data, and ancestry information.
Estimated People with This Name
81
1 in 4,231,535 Americans
Combination Rarity
Rare
First Name
View full profileUnknown
Last Name
View full profileWilliams
Unknown: Popularity Over Time
Year-by-year SSA birth registrations for the first name Unknown. The peak year was 1954 with 1,193 births. The average person named Unknown today is 53 years old.
Ancestry of the Williams Surname
Self-reported race and ethnicity breakdown for people with the surname Williams, from the 2010 U.S. Census Bureau.
How we calculated this
The first name "Unknown" has an estimated frequency of < 0.0001% among living Americans, based on SSA birth records from 1880 to 2024 adjusted for mortality using CDC 2023 life tables.
The surname "Williams" appears at a rate of 550.97 per 100,000 people in the 2010 U.S. Census.
Multiplying these frequencies against the U.S. population of ~343 million gives 81 estimated people. This assumes first names and last names are statistically independent. Full methodology.
Other people named Unknown
Other people with the surname Williams
Unknown Williams: Questions and Answers
How many people are named Unknown Williams?
We estimate approximately 81 people named Unknown Williams are alive in the United States today. The first name Unknown is shared by 14,649 Americans, and the surname Williams is shared by 1,850,671.
How rare is the name Unknown Williams?
This name combination is classified as Rare, occurring at a rate of about 1 in 4,231,535 Americans. The first name Unknown is uncommon and the surname Williams is very common.
Is Unknown a male or female name?
Unknown is predominantly male, with 50.1% of bearers being male and 49.9% female. It peaked in popularity in 1954 and the average bearer today is 53 years old.
Where does this data come from?
First name data comes from the Social Security Administration (1880 to 2024), adjusted for survival using CDC 2023 life tables. Surname data comes from the 2010 U.S. Census Bureau. Full methodology.
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