Tadeusz is a distinctive boys' name in United States, ranking #9517 in 2014 with 8 recorded births. The name reached its all-time peak in 2022 with 13 births ranking #6772. Since 1996, the popularity has increased by 14.3%. In 2014, approximately 1 in every 240,055 boys born was named Tadeusz. FALLING Recent data shows the name is currently falling.