UK boy's name
Tadeusz
A masculine Polish name derived from the Latin name Thaddaeus, meaning "heart" or "courageous".
For 2026, the newest official UK baby-name figures on this page are from 2024. That release is the current official benchmark rather than a forecast.
Tadeusz is a boy's name in the UK records. People looking for Tadeusz popularity in 2026 should use the latest official release, which is 2024 in this profile. In that release it ranked #2443, with 9 babies registered with the name. Its strongest year in the published records was 2019, with 15 births.
This profile covers 145 England and Wales registrations across 18 recorded years from 2005 to 2024. The figures come from ONS England and Wales, so the page is a view of published baby-name registrations rather than a forecast or a live count of people using the name today.
The latest count is about 60% of the recorded peak, which gives a quick read on how the name has moved since its high point.
We estimate that about 144 living people in the UK are called Tadeusz. This uses published birth registrations from England and Wales, Scotland and Northern Ireland, then applies ONS national life tables to estimate how many are likely still alive. It does not forecast extra births for 2025 or 2026.
Key insights
- • Tadeusz ranked #2443 for boys in England and Wales in 2024, with 9 registrations.
- • The name peaked in 2019, when 15 boys were registered as Tadeusz.
- • About 144 living people in the UK are estimated to have Tadeusz as a first name, after adjusting past birth registrations with ONS life tables.
Latest rank (E&W)
#2443
2024
Births in 2024
9
Latest year
Peak year
2019
15 births
Estimated living
144
2026
Meaning
What does Tadeusz mean?
Tadeusz is a Polish name derived from the Latin name Thaddaeus, which itself originated from the Aramaic name Tadday or Tedday. The name is believed to have been derived from the Aramaic word "tad," meaning "breast" or "openhearted." This suggests that the name may have initially been a descriptive nickname referring to someone who was kind, generous, or nurturing.
The name Tadeusz has a long history, dating back to the 1st century AD when it was used by Saint Jude Thaddeus, one of the twelve apostles of Jesus Christ. In the Bible, Jude Thaddeus is referred to as "Judas, not Iscariot" and is the author of the Epistle of Jude in the New Testament.
One of the earliest recorded instances of the name Tadeusz comes from the 12th century, when it was used by Tadeusz Kościelecki, a Polish nobleman and military commander who fought against the Teutonic Knights in the 13th century.
Throughout history, several notable figures have borne the name Tadeusz. One of the most famous was Tadeusz Kościuszko (1746-1817), a Polish military leader and revolutionary who played a significant role in the American Revolutionary War and the Polish-Lithuanian Commonwealth's struggle for independence.
Another prominent figure was Tadeusz Rejtan (1742-1780), a Polish nobleman and politician who gained fame for his dramatic protest against the First Partition of Poland in 1773. Rejtan's act of defiance has become an enduring symbol of Polish patriotism and resistance against foreign oppression.
In the realm of literature, Tadeusz Różewicz (1921-2014) was a renowned Polish poet, playwright, and prose writer who was a prominent figure in the Polish avant-garde movement. His works often explored themes of war, suffering, and the human condition.
Tadeusz Mazowiecki (1927-2013) was a Polish writer, journalist, and politician who served as the first non-communist Prime Minister of Poland after the fall of communism in 1989. He played a pivotal role in Poland's transition to democracy and was widely respected for his commitment to human rights and civil liberties.
Finally, Tadeusz Kantor (1915-1990) was a Polish painter, assemblage artist, and theatre practitioner who is widely regarded as one of the most influential avant-garde artists of the 20th century. His innovative approach to theatre, which he termed "Theatre of Death," challenged traditional conventions and explored themes of memory, death, and the human condition.
Sourced from namecensus.com.
Popularity
Tadeusz over time
The chart below shows babies named Tadeusz registered in England and Wales in the years where the name appears in the published records, from 2005 to 2024. Empty years are left out so rare names are not stretched across long periods where the published files do not show any registrations.
For Tadeusz, the clearest high point is 2019. The latest England and Wales figure is 9 births in 2024, compared with 15 at the peak.
Babies born per year
Decades
Tadeusz by decade
Decade totals smooth out the yearly jumps and make it easier to see whether Tadeusz was a short-lived spike or a name that stayed in regular use. Average rank is calculated only from years where a published rank exists.
| Decade | Average rank | Total births | Years covered |
|---|---|---|---|
| 2020s | #2232 | 48 | 5 |
| 2010s | #2566 | 88 | 10 |
| 2000s | #4269 | 9 | 3 |
Related
Names similar to Tadeusz
- Thomas 160,894
- Tyler 42,147
- Theo 40,594
- Toby 32,482
- Theodore 30,211
- Tommy 25,300
- Teddy 20,781
- Taylor 14,354
- Tobias 13,102
- Tom 9,822
- Tristan 9,171
- Timothy 6,200
FAQ
Tadeusz: questions and answers
How popular is the name Tadeusz in the UK right now?
In 2024, Tadeusz was ranked #2443 for boys in England and Wales, with 9 births registered.
When was Tadeusz most popular?
The peak year on record was 2019, with 15 babies registered as Tadeusz in England and Wales.
What is the meaning and origin of Tadeusz?
A masculine Polish name derived from the Latin name Thaddaeus, meaning "heart" or "courageous".
How many people are called Tadeusz in the UK?
A total of 145 babies have been registered as Tadeusz across the 18 years of ONS England & Wales records shown here.
Which records is this page based on?
The England and Wales timeline uses ONS baby-name records. Scotland figures come from NRS and Northern Ireland figures come from NISRA. Counts are registrations in published baby-name files. The living estimate uses those birth registrations with ONS national life tables.