Tadeas
A Czech masculine given name derived from Thaddaeus, meaning "heart".
Name Census estimates that about 6 living Americans carry the first name Tadeas. The name is used almost exclusively for boys. The average person named Tadeas today is around 10 years old, and the year with the single highest number of Tadeas births was 2016 (6 babies).
This page is the full Name Census profile for Tadeas. Below you will find a gender breakdown showing how the name splits between male and female registrations, a year-by-year popularity chart stretching back to 1880, decade-level totals, the top US states for this name, its meaning and etymology, and a set of frequently asked questions with data-backed answers.
For a British comparison, Name Census UK has a UK baby-name profile for Tadeas with official rankings and popularity over time.
Key insights
- • Fewer than 100 living Americans are believed to carry the name Tadeas. It is among the rarest names in the SSA records.
People living today
6
~ 1 in 57,125,723 Americans
Peak year
2016
6 babies that year
Average age
10
years old
2016 SSA rank
#11,963
Tracked since 2016
Popularity
Tadeas: popularity over time
Babies born per year
Decades
Tadeas by decade
The table below breaks the full SSA timeline into ten-year windows. Each row shows how many male and female babies were given the name Tadeas during that decade, along with a combined total. This is useful for spotting eras where the name surged or retreated.
| Decade | Male | Female | Total |
|---|---|---|---|
| 2010s | 6 | 0 | 6 |
Origin
Meaning and history of Tadeas
The name Tadeas originated from the Greek name Thaddaios, itself derived from the Aramaic name Taddai, meaning "praise" or "confessor of God". It is the Bohemian and Czech form of the name Thaddeus, one of the twelve apostles of Jesus Christ mentioned in the New Testament.
The earliest recorded use of the name Tadeas dates back to the early Christian era, around the 1st century AD. It was a popular name among early Christians, particularly in regions with strong Greek cultural influence, such as parts of the Middle East and the Mediterranean.
One of the earliest known historical figures bearing the name Tadeas was Saint Thaddaeus, also known as Jude the Apostle, one of the twelve apostles of Jesus Christ. He is venerated as a saint in various Christian traditions, including the Catholic Church, Eastern Orthodox Church, and the Anglican Communion.
Another notable historical figure named Tadeas was Tadeas Hayek (1833-1900), a Czech Catholic priest and writer who played a significant role in the Czech national revival movement of the 19th century. He was a prolific author and translator, contributing to the preservation and promotion of the Czech language and culture.
In the 16th century, Tadeas Hájek z Hájku (1525-1600) was a Czech historian and writer known for his work "Kronika česká" (Czech Chronicle), a comprehensive history of the Czech lands and people. He served as a secretary to several Bohemian noblemen and played a crucial role in documenting the cultural and historical heritage of the region.
During the 17th century, Tadeas Soukup z Řenč (1635-1703) was a prominent Czech architect and builder who designed and constructed numerous churches, monasteries, and other significant buildings in the Baroque style throughout Bohemia and Moravia.
In more recent times, Tadeas Reichstein (1897-1996) was a Swiss chemist of Czech descent who received the Nobel Prize in Physiology or Medicine in 1950 for his research on hormones of the adrenal cortex, their chemical structure, and their effects on metabolic processes.
People
Tadeas + last name combinations
How many people share a full name with Tadeas as the first name? Click a combination below to see the estimate, or search any pairing.
Related
Other names starting with T
Other first names starting with T with a similar number of bearers.
FAQ
Tadeas: questions and answers
How many people in the U.S. are named Tadeas?
Name Census puts the figure at roughly 6 living Americans. We arrive at this by taking every SSA birth registration for Tadeas going back to 1880 and adjusting each cohort for expected survival using CDC actuarial life tables. The result is an age-weighted living-bearer count, not a raw birth total. That works out to about 1 in 57,125,723 US residents.
Is Tadeas a common name?
We classify Tadeas as "Very Rare". It ranks above 22.3% of all first names in the SSA dataset by living bearers. Across the full history of the data, 6 babies have been registered with this name.
When was Tadeas most popular?
The single biggest year for Tadeas was 2016, when 6 babies received the name. The fact that the average living Tadeas is about 10 years old gives you a rough sense of which era contributed the most bearers who are still alive today.
What does the SSA popularity chart show?
The chart tracks births, not the number of people alive with the name today. Each point shows how many babies were given the name Tadeas in that year. That makes it useful for spotting when the name rose, peaked, or faded.
Is Tadeas a male name?
Yes, 100.0% of people registered as Tadeas in the SSA data are male. You can see the full per-sex comparison in the gender distribution section above, which includes the latest year rank, birth count, and peak year for each sex.
Is Tadeas still being used today?
Yes. The SSA still recorded Tadeas in 2024, and the page above shows its latest-year rank where available. A name can be well past its peak and still remain in steady use, especially if it built up a large population over earlier decades.
Why can a name have a lot of living bearers even if it is not trendy now?
Because living-bearer counts and current baby-name popularity measure different things. A name like Tadeas can build up a very large population over many decades, even if fewer parents are choosing it now than they did at its peak.
Where does this data come from?
First-name figures come from the Social Security Administration's national baby name files, which cover every name on a birth certificate from 1880 to 2024. Living-bearer estimates layer in CDC actuarial life tables broken out by sex to account for mortality. The population baseline (342,754,338) is the Census Bureau's latest national estimate. You can read the full calculation on our methodology page.
Does every first name have Census demographic data?
No. The public Census first-name release only covers names that met the Bureau's publication rules, so many rarer names in the SSA files do not have a published Census demographic snapshot. In those cases, the page still shows the SSA trend, gender history, and state data.
How common is the name Tadeas?
For a faster, more casual read, check HowManyOfMe.org — our sister site built around that single question.