Tadeusz is a distinctive boys' name in United States, ranking #13824 in 2021 with 5 recorded births. The name reached its all-time peak in 2022 with 13 births ranking #6772. Since 1996, the popularity has decreased by 28.6%. In 2021, approximately 1 in every 349,647 boys born was named Tadeusz. FALLING Recent data shows the name is currently falling.