Tadeusz is a distinctive boys' name in United States, ranking #10707 in 2003 with 6 recorded births. The name reached its all-time peak in 2022 with 13 births ranking #6772. Since 1996, the popularity has decreased by 14.3%. In 2003, approximately 1 in every 329,212 boys born was named Tadeusz. FALLING Recent data shows the name is currently falling.