breast, the name of one of the apostles (Mark 3:18), called "Lebbaeus" in Matt. 10:3, and in Luke 6:16, "Judas the brother of James;" while John (14:22), probably referring to the same person, speaks of "Judas, not Iscariot." These different names all designate the same person, viz., Jude or Judas, the author of the epistle.
one of the original Twelve Apostles. He is distinguished in John 14:22 as "not Iscariot" to avoid identification with the betrayer of Jesus, Judas Iscariot. Listed in Luke 6:16 and Acts 1:13 as "Judas of James," some Biblical versions (e.g., Revised Standard and New English) interpret this designation to mean "son of James" (i.e., probably the Apostle St. James, son of Alphaeus), while others (e.g., Authorized and Douay) call him "brother of James." Judas is more probably identified with Thaddaeus (Lebbaeus) in Mark 3:18 and Matt. 10:3 and less probably with Jesus' "brother" Judas (Mark 6:3, Matt. 13:55), reputed author of the canonical Letter of Jude that warns against the licentious and blasphemous heretics.
Learn more about Thaddaeus with a free trial on Britannica.com.