Lumi Williams
There are approximately 3 people named Lumi 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 Lumi with Census Bureau frequency data for the surname Williams. Below you will find a breakdown of both names, including popularity trends, gender data, and Census demographics where available.
Expected bearers
3
1 in 114,251,446
Named Lumi
602
Alive today
Named Williams
1.8M
Alive today
US population
343M
Denominator
Estimated living: 602
Rarity: Very Rare
Gender: Female
Peak year: 2022
Average age: 6
Estimated bearers: 1.8M
Rarity: Very Common
Census rank: #3
Per 100K: 522.38
Top ancestry: Black (46.2%)
First name trend
Lumi: popularity over time
Year-by-year SSA birth registrations for the first name Lumi. The peak year was 2022 with 97 births. The average person named Lumi today is 6 years old.
Babies born per year
Ethnicity
Ancestry of the Williams surname
Self-reported race and ethnicity breakdown for people with the surname Williams, from the 2020 US Census Bureau. The largest group is Black at 46.2%.
The bar chart below shows how people with the surname Williams described their own race and ethnicity on the 2020 Census form. These are self-reported numbers, and they describe the population who happened to carry the surname Williams at the time of the Census. A surname does not determine a person's race or ethnicity.
- Black or African American46.2% · 721,683
- White43.8% · 684,271
- Two or more races5.1% · 79,393
- Hispanic or Latino3.5% · 54,634
- American Indian and Alaska Native0.8% · 12,205
- Asian and Pacific Islander0.6% · 9,209
Methodology
How we calculated this
The first name Lumi has a living-bearer frequency of 0.0002% of the US population, based on 602 estimated living Americans carrying this first name (from SSA birth records going back to 1880, adjusted for mortality using CDC life tables).
The surname Williams appears at a rate of 522.38 per 100,000 residents in the 2020 Census Bureau surname file, which translates to a frequency of 0.5224%.
Multiplying these two independent frequencies against the current US population of 342,754,338 gives an expected count of approximately 3 people with the full name Lumi Williams. This assumes statistical independence between first and last names, which is a simplification but produces reasonable estimates for most combinations.
Related
Other people with the surname Williams
FAQ
Lumi Williams: questions and answers
How many people are named Lumi Williams?
We estimate approximately 3 people in the United States share the full name Lumi Williams. That works out to about 1 in 114,251,446 Americans. This is calculated by combining the first-name frequency (0.0002%) with the surname frequency (522.38 per 100K) against the current US population.
How rare is the name Lumi Williams?
We classify Lumi Williams as "Very Rare". About 1 in 114,251,446 Americans share this exact first and last name combination.
Is Lumi a male or female name?
Lumi is predominantly female. Out of 606 total SSA registrations, 4.3% were male and 95.7% were female. See the full Lumi profile for detailed gender data.
Where does this data come from?
First-name data comes from the Social Security Administration's national baby name files (1880 to 2024). Surname data comes from the 2020 US Census Bureau decennial surname tables. Living-bearer estimates use CDC actuarial life tables to adjust for mortality. Read the full methodology.
How many Americans are named Lumi Williams?
HowManyOfMe.org, our sister site, answers that with the living-bearer count in one glance.