How Many People Are Named Theodore Simon?

There are approximately 52 people named Theodore Simon living in the United States today. That makes this name combination rare, occurring at a rate of about 1 in 6,591,430 Americans.

This estimate combines SSA birth records for the first name Theodore with Census Bureau frequency data for the surname Simon. Below you will find a breakdown of both names, including popularity trends, gender data, and Census background data where it is available.

Estimated People with This Name

1 in 6,591,430 Americans

Combination Rarity

Rare

Very Rare Very Common

First Name

Theodore

Last Name

Simon

Theodore: Popularity Over Time

Year-by-year SSA birth registrations for the first name Theodore. The peak year was 2024 with 12,024 births. The average person named Theodore today is 34 years old.

Male

Female

Ancestry of the First Name Theodore

In the 2020 Census, the first name Theodore was most commonly recorded among people who identified as White (76.60%). The next largest recorded groups were Black (10.07%) and Hispanic (5.36%).

These percentages describe the people who had the first name Theodore in the 2020 Census. They do not tell you the deeper origin or meaning of the name itself.

Read this as a snapshot of who already had the name in 2020, not as a trend line. The SSA chart above is still the better way to see how Theodore rose or fell over time.

White

76.60%

Black

10.07%

Hispanic

5.36%

Asian/Pacific Islander

2.78%

American Indian/Alaska Native

0.64%

Two or More Races

4.56%

Ancestry of the Simon Surname

The surname Simon was most commonly recorded among people who identified as White in the 2020 Census.

This is a self-reported race and ethnicity breakdown for people who had the surname Simon in the published Census surname tables. It gives useful context around who was recorded with the name, but it does not tell the full family history of every Boone line.

White

61.91%

Black

22.35%

Hispanic

8.24%

Asian/Pacific Islander

3.33%

American Indian/Alaska Native

0.66%

Two or More Races

3.52%

How we calculated this

The first name "Theodore" has an estimated frequency of 0.0575% among living Americans, based on SSA birth records from 1880 to 2024 adjusted for mortality using CDC 2023 life tables.

The surname "Simon" appears at a rate of 26.33 per 100,000 people in the 2020 U.S. Census.

We do not use the Census first-name snapshot for the main estimate because it is only published once every 10 years. The latest public first-name Census file is from 2020, which is already 6 years old. SSA birth records plus CDC survival data give a better current estimate of how many people with the first name Theodore are likely to be alive now.

Multiplying these frequencies against the U.S. population of ~343 million gives 52 estimated people. This assumes first names and last names are statistically independent. Full methodology.

Other people named Theodore

Theodore Smith Theodore Johnson Theodore Williams Theodore Brown Theodore Jones Theodore Garcia Theodore Perez Theodore Turner

Other people with the surname Simon

Michael Simon James Simon John Simon David Simon Robert Simon William Simon Paul Simon Lisa Simon

Theodore Simon: Questions and Answers

How many people are named Theodore Simon?

We estimate approximately 52 people named Theodore Simon are alive in the United States today. The first name Theodore is shared by 197,010 Americans, and the surname Simon is shared by 90,248.

How rare is the name Theodore Simon?

This name combination is classified as Rare, occurring at a rate of about 1 in 6,591,430 Americans. The first name Theodore is common and the surname Simon is uncommon.

Is Theodore a male or female name?

Theodore is predominantly male, with 99.7% of bearers being male and 0.3% female. It peaked in popularity in 2024 and the average bearer today is 34 years old.

What does the Census say about the first name Theodore?

In the 2020 Census, the first name Theodore was most commonly recorded among people who identified as White (76.60%). The next largest recorded groups were Black (10.07%) and Hispanic (5.36%). These percentages describe the people who had the name in the 2020 Census, not the deeper origin of the name itself.

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. When available, first-name Census background data comes from the 2020 U.S. Census Bureau first-name tables. Surname data comes from the 2020 U.S. Census Bureau. Full methodology.

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