How Many People Are Named Isac Williams?
There are approximately 15 people named Isac Williams living in the United States today. That makes this name combination rare, occurring at a rate of about 1 in 22,850,289 Americans.
This estimate combines SSA birth records for the first name Isac 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
15
1 in 22,850,289 Americans
Combination Rarity
Rare
First Name
View full profileIsac
Last Name
View full profileWilliams
Isac: Popularity Over Time
Year-by-year SSA birth registrations for the first name Isac. The peak year was 2006 with 148 births. The average person named Isac today is 24 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 "Isac" 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 15 estimated people. This assumes first names and last names are statistically independent. Full methodology.
Other people with the surname Williams
Isac Williams: Questions and Answers
How many people are named Isac Williams?
We estimate approximately 15 people named Isac Williams are alive in the United States today. The first name Isac is shared by 2,733 Americans, and the surname Williams is shared by 1,850,671.
How rare is the name Isac Williams?
This name combination is classified as Rare, occurring at a rate of about 1 in 22,850,289 Americans. The first name Isac is rare and the surname Williams is very common.
Is Isac a male or female name?
Isac is predominantly male, with 100.0% of bearers being male and 0.0% female. It peaked in popularity in 2006 and the average bearer today is 24 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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