Thaddeus is a name of Aramaic origin, meaning "heart" or "courageous." It is often associated with one of the twelve apostles of Jesus, known as Thaddeus the Apostle or Jude Thaddeus. He is recognized for his role in spreading the teachings of Christianity in the early church. In addition to its biblical significance, Thaddeus is also a common given name in various cultures. It has been used in literature and history, often symbolizing bravery and loyalty. The name remains popular today, appearing in various forms across different languages and regions.