How Many People Are Named Cecilia Williams?
There are approximately 428 people named Cecilia Williams living in the United States today. That makes this name combination uncommon, occurring at a rate of about 1 in 800,828 Americans.
This estimate combines SSA birth records for the first name Cecilia 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
428
1 in 800,828 Americans
Combination Rarity
Uncommon
First Name
View full profileCecilia
Last Name
View full profileWilliams
Cecilia: Popularity Over Time
Year-by-year SSA birth registrations for the first name Cecilia. The peak year was 2024 with 2,238 births. The average person named Cecilia today is 34 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 "Cecilia" has an estimated frequency of 0.0227% 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 428 estimated people. This assumes first names and last names are statistically independent. Full methodology.
Other people named Cecilia
Other people with the surname Williams
Cecilia Williams: Questions and Answers
How many people are named Cecilia Williams?
We estimate approximately 428 people named Cecilia Williams are alive in the United States today. The first name Cecilia is shared by 77,704 Americans, and the surname Williams is shared by 1,850,671.
How rare is the name Cecilia Williams?
This name combination is classified as Uncommon, occurring at a rate of about 1 in 800,828 Americans. The first name Cecilia is uncommon and the surname Williams is very common.
Is Cecilia a male or female name?
Cecilia is predominantly female, with 0.2% of bearers being male and 99.8% female. It peaked in popularity in 2024 and the average bearer today is 34 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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