Thadeus is a distinctive boys' name in United States, ranking #8074 in 2012 with 10 recorded births. The name reached its all-time peak in 2007 with 23 births ranking #4354. Since 1996, the popularity has increased by 11.1%. In 2012, approximately 1 in every 189,663 boys born was named Thadeus. RISING Recent data shows the name is currently rising.