Thaddeus is a masculine name of Greek origin that means "courageous heart." Individuals named Thaddeus are often known for their bravery, resilience, and strong sense of loyalty. Thaddeus is a timeless and classic name that is both strong and sophisticated. Those with this name are known for their charismatic personalities and natural leadership abilities. Overall, Thaddeus is a name that conveys strength, courage, and a deep sense of integrity.