Thadeus is a distinctive boys' name in United States, ranking #7099 in 2016 with 12 recorded births. The name reached its all-time peak in 2007 with 23 births ranking #4354. Since 1996, the popularity has increased by 33.3%. In 2016, approximately 1 in every 158,101 boys born was named Thadeus. RISING Recent data shows the name is currently rising.