Thadeus is a distinctive boys' name in United States, ranking #9646 in 2019 with 8 recorded births. The name reached its all-time peak in 2007 with 23 births ranking #4354. Since 1996, the popularity has decreased by 11.1%. In 2019, approximately 1 in every 224,170 boys born was named Thadeus. RISING Recent data shows the name is currently rising.