Apostle
In the Latter Day Saint movement, an apostle is a "special witness of the name of Jesus Christ who is sent to teach the principles of salvation to others." In many Latter Day Saint churches, an apostle is a priesthood office of high authority within the church hierarchy. As of March 31st, 2018, the Twelve Apostles of the LDS Church are: M. Russell Ballard, Jeffrey R. Holland, Dieter F. Uchtdorf, David A. Bednar, Quentin L. Cook, D. Todd Christofferson, Neil L. Anderson, Ronald A. Rasband, Gary E. Stevenson, Dale G. Renlund, Gerrit W. Gong, and Ulisses Soares. There are also members of the Quorum of the Seventy (referred to as “Seventies”). They typically work under the direction of the twelve apostles and are given similar responsibilities that build up the church. In many churches, apostles may be members of the Quorum of the Twelve Apostles of the church. In most Latter Day Saint churches, modern-day apostles are considered to have the same status and authority as the biblical apostles. In the Latter Day Saint tradition, apostles and prophets are believed to be the foundation of the church, with Jesus as the chief cornerstone. The Articles of Faith, written by Joseph Smith, mentions apostles: "We believe in the same organization that existed in the Primitive Church, namely, apostles, prophets, pastors, teachers, evangelists, and so forth."
Simon the Zealot
The 2nd century "Epistle of the Apostles" ("Epistula Apostolorum"), a polemic against gnostics, lists him among the apostles purported to be writing the letter (who include Thomas) as Judas Zelotes and certain Old Latin translations of the Gospel of Matthew substitute "Judas the Zealot" for Thaddeus/Lebbaeus in Matthew 10:3. To some readers, this suggests that he may be identical with the "Judas not Iscariot" mentioned in John 14:22: "Judas saith unto him, not Iscariot, Our Lord, how is it that thou wilt manifest thyself unto us, and not unto the world?" As it has been suggested that Jude is identical with the apostle Thomas (see Jude Thomas), an identification of "Simon Zelotes" with Thomas is also possible. Barbara Thiering identified Simon Zelotes with Simon Magus, however this view has received no serious acceptance. The New Testament records nothing more of Simon, aside from this multitude of possible but unlikely pseudonyms. He is buried in the same tomb as St. Jude Thaddeus, in the left transept of the St. Peter's Basilica in Rome, under the altar of St. Joseph.