Heart or courageous
A variant of Thaddeus, likely derived from the Aramaic word 'tadday' meaning heart or chest, implying a courageous person. It may also be a Greek form of the Hebrew name Judah. The name has long been associated with one of the twelve apostles in the New Testament.
Fewer than 5 boys were named Thadius in 2025.
US births per 5-year period, 1990–present (SSA data).
A character in the video game series · The Elder Scrolls
Powerful US Congressman and abolitionist leader
Polish-Lithuanian military engineer and hero of the American Revolution
Professional NBA basketball player
