Thaddaeus

Thaddaeus, one of the twelve apostles, is listed in Mark 3:18 and Matthew 10:3 where he is also called Lebbaeus. He is generally identified with Judas son of James (Luke 6:16; Acts 1:13), making him the apostle Judas who is distinguished from Iscariot. The name Thaddaeus may mean breast or heart, reflecting a term of endearment.

His only recorded words in the Gospels come at the Last Supper, where he asked Jesus, "Lord, how is it that you will manifest yourself to us and not to the world?" (John 14:22), prompting Jesus's teaching on the indwelling of the Spirit. Church tradition assigns him missionary work in Edessa and Persia, but these accounts are largely legendary. He is commemorated with Simon the Zealot in the Western liturgical calendar.