Thaddaeus is a distinctive boys' name in United States, ranking #7209 in 2022 with 12 recorded births. The name reached its all-time peak in 2005 with 29 births ranking #3444. Since 1996, the popularity has decreased by 50.0%. In 2022, approximately 1 in every 145,364 boys born was named Thaddaeus. FALLING Recent data shows the name is currently falling.