How Many People Are Named Oisin Williams?
There are approximately 3 people named Oisin Williams living in the United States today. That makes this name combination very rare, occurring at a rate of about 1 in 114,251,446 Americans.
This estimate combines SSA birth records for the first name Oisin 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
3
1 in 114,251,446 Americans
Combination Rarity
Very Rare
First Name
View full profileOisin
Last Name
View full profileWilliams
Oisin: Popularity Over Time
Year-by-year SSA birth registrations for the first name Oisin. The peak year was 2020 with 31 births. The average person named Oisin today is 13 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 "Oisin" 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 3 estimated people. This assumes first names and last names are statistically independent. Full methodology.
Other people named Oisin
Other people with the surname Williams
Oisin Williams: Questions and Answers
How many people are named Oisin Williams?
We estimate approximately 3 people named Oisin Williams are alive in the United States today. The first name Oisin is shared by 486 Americans, and the surname Williams is shared by 1,850,671.
How rare is the name Oisin Williams?
This name combination is classified as Very Rare, occurring at a rate of about 1 in 114,251,446 Americans. The first name Oisin is very rare and the surname Williams is very common.
Is Oisin a male or female name?
Oisin is predominantly male, with 100.0% of bearers being male and 0.0% female. It peaked in popularity in 2020 and the average bearer today is 13 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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