Saint Jude (or Judas) is a Christian saint identified as both Jude of James and Thaddeus(N27) in the New Testament. He is also called Lebbaeus, Thaddaeus, or Judas Thaddaeus. Though both bear the same first name in the Greek original New Testament, Jude should not be confused with Judas Iscariot, another disciple and later the betrayer of Jesus. Their name is a Greek variant of Judah and was common among Jews at the time.

The Armenian Apostolic Church honours Thaddeus along with Saint Bartholomew as her patron saints. In the Roman Catholic Church he is the patron saint of desperate cases and lost causes.

Saint Jude's attribute is a club. He is also often shown in icons with a flame around his head. This represents his presence at Pentecost, when he received the Holy Spirit with the other apostles. He is shown with a flame around his head because he is the patron of lost causes and can perform some great miracles for the hopeless. He is shown with this because just as the Holy Spirit performs miracles, St. Jude performs them as well. Occasionally he is represented holding an axe or halberd, as he was brought to death by one of these weapons. In some instances he may be shown with a scroll or a book (the Epistle of Jude) or holding a carpenter's rule.