Thadius is a distinctive boys' name in United States, ranking #10760 in 2024 with 7 recorded births. This places Thadius in the bottom 24% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 1998 with 14 births ranking #4847. Since 1996, the popularity has decreased by 30.0%. In 2024, approximately 1 in every 245,045 boys born was named Thadius. RISING Recent data shows the name is currently rising.