Thadius, of Latin origin, is an uncommon yet distinguished given name for males. Derived from the Roman family name Attius, which was a derivative of the gens Atilia, Thadius signifies "from Attia" or "of Attian origin." This name holds historical significance, as it was borne by several notable figures in ancient Rome, such as Marcus Attilius Primus, a Roman general during the reign of Augustus. In modern times, Thadius is rarely encountered, contributing to its uniqueness and exclusivity. It has no established variant spellings or related names, further emphasizing its singularity.
The name Thadius experienced a significant peak in popularity between the late 1960s and early 1970s, with a high of 19 births in 1974. However, it seems to have fallen out of favor since then, with less than 10 births per year from 1975 onwards, and only 5-9 births per year in the 21st century. Overall, there were a total of 504 babies named Thadius between 1922 and 2020.