Thadeus is a distinctive boys' name in United States, ranking #6662 in 2010 with 13 recorded births. The name reached its all-time peak in 2007 with 23 births ranking #4354. Since 1996, the popularity has increased by 44.4%. In 2010, approximately 1 in every 147,570 boys born was named Thadeus. RISING Recent data shows the name is currently rising.