Thadeus is a distinctive boys' name in United States, ranking #5052 in 2006 with 18 recorded births. The name reached its all-time peak in 2007 with 23 births ranking #4354. Since 1996, the popularity has increased by 100.0%. In 2006, approximately 1 in every 114,173 boys born was named Thadeus. RISING Recent data shows the name is currently rising.