Heart or courageous
A variant of Thaddeus, likely derived from the Aramaic word 'tadda' meaning heart or chest, implying a courageous or big-hearted person. It is also sometimes associated with the Greek name Theodoros, meaning gift of God.
Fewer than 5 boys were named Thaddius in 2025.
Guyanese Olympic hurdler
A boss character in the Naxxramas raid · World of Warcraft
US births per 5-year period, 1990–present (SSA data).
