Thaddeus is a distinctive boys' name in United States, ranking #827 in 1999 with 184 recorded births. The name reached its all-time peak in 2016 with 416 births ranking #640. Since 1996, the popularity has decreased by 14.8%. In 1999, approximately 1 in every 10,435 boys born was named Thaddeus. RISING Recent data shows the name is currently rising.