Thadeus is a distinctive boys' name in United States, ranking #3897 in 2002 with 22 recorded births. The name reached its all-time peak in 2007 with 23 births ranking #4354. Since 1996, the popularity has increased by 144.4%. In 2002, approximately 1 in every 88,249 boys born was named Thadeus. RISING Recent data shows the name is currently rising.