How Many People Are Named Thaddeaus?
An estimated 124 people in the United States have the first name Thaddeaus. It is almost exclusively a male name. The average bearer is 34 years old, and Thaddeaus peaked in popularity in 1993 with 10 births that year.
Below you will find a full statistical profile of Thaddeaus 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 Thaddeaus paired with any surname.
Estimated Living Americans
124
About 1 in 2,764,148 people in the U.S.
Rarity
Very Rare
Predicted Gender
Male
100.0% confidence
Average Age
34
years old
Peak Year
1993
10 births
Total Registered
138
since 1880
Gender Distribution for Thaddeaus
Thaddeaus is almost exclusively a male name. Out of 138 total births registered, 100.0% were male.
Thaddeaus as a male name
Ranked #14,045 in 2010
5 male births in 2010
Peak: 1993 (10 births)
Thaddeaus: Popularity Over Time
SSA records for Thaddeaus span from the 1910s to the 2010s, covering 7 decades of naming data. The most popular decade for this name was the 1990s, when 36 babies were registered. Thaddeaus has declined significantly from its peak in the 1990s. Recent registrations are a fraction of what they were at the name's height.
Thaddeaus by Decade
How has Thaddeaus 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.
Thaddeaus + Last Name Combinations
How many people share a full name with Thaddeaus as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Thaddeaus
Other first names starting with T with a similar number of bearers.
Thaddeaus: Questions and Answers
How many people in the U.S. are named Thaddeaus?
We estimate approximately 124 people named Thaddeaus 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 2,764,148 Americans share this first name.
Is Thaddeaus a common name?
Thaddeaus is classified as "Very Rare" and is more popular than 67.6% of all first names in the SSA database. A total of 138 births have been registered with this name since 1880.
When was Thaddeaus most popular?
Thaddeaus reached peak popularity in 1993, when 10 babies were given this name. The average age of a living person named Thaddeaus is approximately 34 years old, reflecting when the name was most commonly given.
Is Thaddeaus a male name?
Thaddeaus is predominantly male. 100.0% of people with this name are male. See the gender breakdown above for full details.
How many Thaddeaus Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Thaddeaus Smith, Thaddeaus Johnson, Thaddeaus 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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