Baby Names US
boys' name ★ peaked 1917

Tadeusz

Gender Boy Rank 2025 Below top lists
Rank 2025
–
among boys
Babies in 2025
<5
named Tadeusz
How common
–
boys born in 2025
Peak year
1917
26 babies
All-time total
423
#8,731 all-time among boys
First recorded
1912
in Social Security records

Tadeusz popularity over time

423 babies have been named Tadeusz since 1912, according to official Social Security records. Switch measure to see births per year or the yearly rank.

Measure
Births per 1,000 babies of that sex, comparable across eras
0.010.020.020.0318801900192019401960198020002020Peak 1917Boys

By decade. Change compares yearly averages, so the current partial decade is on equal footing. Best rank is the name's best yearly rank within the decade.

Decade Boys Per year Change Best rank
1880s – – – –
1890s – – – –
1900s – – – –
1910s 101 10 – #1,388
1920s 95 10 -6% #2,043
1930s 6 1 -94% #3,956
1940s – – – –
1950s 24 2 – #3,227
1960s 35 4 +46% #2,591
1970s 22 2 -37% #3,662
1980s 33 3 +50% #4,938
1990s 18 2 -45% #7,869
2000s 12 1 -33% #10,195
2010s 37 4 +208% #9,520
2020s (to 2025) 40 7 +80% #6,777

The story of Tadeusz

Tadeusz is not currently in use for newborns in the United States: fewer than five babies received the name in 2025. Its story lives in the historical record below.

Since 1912, 423 American babies have been named Tadeusz. Its peak came in 1917, when 26 newborns received the name, the signature sound of the 1910s.

The chart above shows the full history: the popularity view (births per 1,000 babies) is the honest comparison across generations, since total US births have changed enormously since 1880. Switch to the rank view to see where Tadeusz stood among all boys' names in any year, or use the compare tool to plot it against other names.

How old are people named Tadeusz?

The median living Tadeusz is about 35 years old; half are between 8 and 55. An estimated 200 people named Tadeusz are alive in the United States today.

median 35 020406080100

Estimated from births per year and Social Security period life tables; an approximation of the living age distribution, by age in years.

Tadeusz year by year

Every year since 2001, and five-year steps back to 1880. Rank is within each sex.

Year Boys Boys rank
2025 – –
2024 5 #13,996
2023 9 #8,833
2022 13 #6,777
2021 5 #13,830
2020 8 #9,449
2019 7 #10,670
2018 – –
2017 7 #10,628
2016 – –
2015 5 #13,800
2014 8 #9,520
2013 – –
2012 5 #13,965
2011 – –
2010 5 #14,002
2009 – –
2008 – –
2007 – –
2006 – –
2005 – –
2004 – –
2003 6 #10,706
2002 – –
2001 – –
2000 6 #10,195
1995 – –
1990 6 #8,001
1985 5 #7,459
1980 5 #7,181
1975 5 #6,231
1970 8 #3,800
1965 – –
1960 – –
1955 5 #4,337
1950 – –
1945 – –
1940 – –
1935 – –
1930 6 #3,956
1925 15 #2,177
1920 17 #2,043
1915 14 #2,053
1910 – –
1905 – –
1900 – –
1895 – –
1890 – –
1885 – –
1880 – –

Famous people named Tadeusz

The most globally famous bearers of the name, ranked by fame across Wikipedia editions (Pantheon project, MIT).

  1. 1 Tadeusz Kościuszko Tadeusz Kościuszko Polish military leader (1746–1817) 18th century
  2. 2 Tadeusz Bór-Komorowski Tadeusz Bór-Komorowski Polish military leader (1895–1966) 19th century
  3. 3 Tadeusz Mazowiecki Tadeusz Mazowiecki 40th Prime Minister of Poland (1989–1991) 1927–2013 · Contemporary
  4. 4 Tadeusz Borowski Tadeusz Borowski Polish writer and journalist 1922–1951 · Contemporary
  5. 5 Tadeusz Kantor Tadeusz Kantor Polish painter (1915–1990) Contemporary
  6. 6 Tadeusz Kutrzeba Tadeusz Kutrzeba Polish general (1885–1947) 19th century
  7. 7 Tadeusz Boy-Żeleński Tadeusz Boy-Żeleński Polish writer and translator (1874–1941) 19th century
  8. 8 Tadeusz Reichstein Tadeusz Reichstein Polish-Swiss chemist (1897–1996) 19th century
  9. 9 Tadeusz Różewicz Tadeusz Różewicz Polish poet, playwright, writer, and translator (1921–2014) Contemporary
  10. 10 Tadeusz Konwicki Tadeusz Konwicki Polish writer and film director 1926–2015 · Contemporary
  11. 11 Tadeusz Banachiewicz Tadeusz Banachiewicz Polish astronomer, mathematician and geodesist 1882–1954 · 19th century
  12. 12 Tadeusz Ajdukiewicz Tadeusz Ajdukiewicz Polish painter (1852–1916) 19th century
  13. 13 Tadeusz Baird Tadeusz Baird Polish composer (1928–1981) Contemporary
  14. 14 Tadeusz Ślusarski Tadeusz Ślusarski Polish pole vaulter 1950–1998 · Contemporary

Portraits from Wikipedia (Wikimedia Commons).

Frequently asked questions

Quick answers about Tadeusz, drawn from the same Social Security data as the charts above.

How old is the average Tadeusz?

The median living Tadeusz is about 35 years old. Half of all living Tadeuszs are between 8 and 55 years old.

How many people named Tadeusz are alive today?

An estimated 200 people named Tadeusz are alive in the United States, based on 423 recorded births and Social Security life tables.

How popular is the name Tadeusz in 2025?

Tadeusz did not appear in the 2025 Social Security data, which means fewer than five babies received the name that year.

How many people are named Tadeusz?

423 babies have been named Tadeusz in the United States since 1912, based on Social Security card applications.

When was the name Tadeusz most popular?

Tadeusz peaked in 1917, when 26 newborns received the name.

Is Tadeusz a boy or girl name?

Tadeusz is overwhelmingly a boy's name: 100% of babies with the name.

Is the name Tadeusz rising or falling?

Tadeusz is on the rise, noticeably more popular now than a decade ago.

Who are famous people named Tadeusz?

Well-known people named Tadeusz include Tadeusz Kościuszko (military personnel), Tadeusz Bór-Komorowski (military personnel), Tadeusz Mazowiecki (writer).

Names like Tadeusz

Names that sound and feel close to Tadeusz: shared sounds, similar era, similar popularity. Each links to its full history.

Compare Tadeusz with similar names → More names starting with T →