How Many People Are Named Theadore?
An estimated 1,560 people in the United States have the first name Theadore. It is almost exclusively a male name. The average bearer is 66 years old, and Theadore peaked in popularity in 1927 with 91 births that year.
Below you will find a full statistical profile of Theadore as a first name in the United States, including gender data, a year-by-year popularity timeline going back to 1880, a decade breakdown, and state-by-state birth registrations. You can also check how many people share the full name Theadore paired with any surname.
Key Insights
- With an average bearer age of 66, Theadore is a vintage name most associated with earlier generations. Most living bearers were born before 1970.
Estimated Living Americans
1,560
About 1 in 219,714 people in the U.S.
Rarity
Rare
Predicted Gender
Male
100.0% confidence
Average Age
66
years old
Peak Year
1927
91 births
Total Registered
4,000
since 1880
Gender Distribution for Theadore
Theadore is almost exclusively a male name. Out of 4,000 total births registered, 100.0% were male.
Theadore as a male name
Ranked #10,762 in 2024
7 male births in 2024
Peak: 1927 (91 births)
Theadore: Popularity Over Time
SSA records for Theadore span from the 1880s to the 2020s, covering 15 decades of naming data. The most popular decade for this name was the 1920s, when 770 babies were registered. Theadore has declined significantly from its peak in the 1920s. Recent registrations are a fraction of what they were at the name's height.
Theadore by Decade
How has Theadore tracked across different eras? The table below groups all SSA birth registrations into 10-year periods, with separate male and female counts. The colored bar shows each decade's share relative to the peak.
Theadore by State
Birth registrations for Theadore span all 22 states and territories in the SSA database. The highest counts are in Pennsylvania, South Carolina, California. The lowest are in Tennessee, New Jersey, Missouri. On average, about 39 Theadores were registered per state.
Theadore + Last Name Combinations
How many people share a full name with Theadore as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Theadore
Other first names starting with T with a similar number of bearers.
Theadore: Questions and Answers
How many people in the U.S. are named Theadore?
We estimate approximately 1,560 people named Theadore are alive in the United States today. This is based on SSA birth records from 1880 to 2024, adjusted for mortality using CDC life tables. About 1 in 219,714 Americans share this first name.
Is Theadore a common name?
Theadore is classified as "Rare" and is more popular than 92.6% of all first names in the SSA database. A total of 4,000 births have been registered with this name since 1880.
When was Theadore most popular?
Theadore reached peak popularity in 1927, when 91 babies were given this name. The average age of a living person named Theadore is approximately 66 years old, reflecting when the name was most commonly given.
Is Theadore a male name?
Theadore is predominantly male. 100.0% of people with this name are male. See the gender breakdown above for full details.
How many Theadore Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Theadore Smith, Theadore Johnson, Theadore Williams. You can also search any combination on our homepage.
Where does this data come from?
Our estimates use Social Security Administration birth records (1880 to 2024), adjusted for survival using CDC 2023 life tables broken down by sex. The U.S. population figure (342,754,338) is from the Census Bureau's July 2025 estimate. Full methodology.
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