The Church commemorates Saint Judas the Apostle, brother of Jesus, also known as Thaddaeus or Lebbaeus, and of Martyr Zosimus, Saint Paisios the Great and Saint Zeno.
Saint Judas the Apostle is also variously called Judas Thaddaeus or Lebbaeus.
However, he is clearly distinguished from Judas Iscariot, the apostle who betrayed Jesus prior to his crucifixion.
He was the son of Joseph, the spouse of the Blessed Virgin Mary, and brother of James, the brother of the Lord, the first hierarch of Jerusalem. He was one of the twelve disciples of Jesus.
He should not be confused with the Thaddeus of the Seventy Apostles, whose memory is celebrated on August 21.
The confusion may have been due to the fact that both apostles lived and preached at the same time and in the same geographical area.
After the Ascension and the Pentecost, Judas preached the Gospel in Palestine and Mesopotamia. He suffered many persecutions and hardship and eventually martyred for his faith in Edessa, Syria.
Source: Church of Cyprus