No, Thaddaeus and Judas son of James are two different disciples. Thaddaeus is also known as Lebbaeus or Jude, and is mentioned in the Gospel of Matthew and the Gospel of Mark. Judas son of James, on the other hand, is mentioned in the Gospel of Luke and the Book of Acts. Both Thaddaeus and Judas son of James were among the twelve apostles chosen by Jesus, but they are separate individuals.
