Thadeus is a distinctive boys' name in United States, ranking #6770 in 2009 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 2009, approximately 1 in every 152,562 boys born was named Thadeus. RISING Recent data shows the name is currently rising.