Title: Brothers of Jesus
Content:  The New Testament describes James, Joseph (Joses), Judas (Jude), and Simon as brothers of Jesus (ἀδελφοί). Also mentioned, but not named, are sisters of Jesus. The Catholic, Assyrian, and Eastern Orthodox churches believe in the perpetual virginity of Mary, which is however not a dogma to most Protestant churches today, with many Protestants believing that Mary had other children besides Jesus. Those who uphold the dogma of the perpetual virginity of Mary reject the claim that Jesus had biological siblings and maintain these brothers and sisters received this designation because of their close association with the nuclear family of Jesus, as either children of Joseph from a previous marriage, or as 
Title: James, brother of Jesus
Content:  siblings are often described together, without reference to any other relatives (Matthew 12:46–49, Mark 3:31–34, Mark 6:3, Luke 8:19–21, John 2:12, Acts 1:14), and Jesus's brothers are described without allusion to others (John 7:2–5, 1 Corinthians 9:5. For example, Matthew 13:55–56 says, "Isn't this the carpenter's son? Isn't his mother's name Mary, and aren't his brothers James, Joseph, Simon, and Jude? Aren't all his sisters with us?" and John 7:5 says, "Even his own brothers did not believe in him." Clement of Alexandria (c. undefined 150-c. undefined 215), Tertullian (c. undefined 160 -c. undefined 220), and Helvidius (c. undefined 380) were among the theologians who thought that Mary had children other than Jesus. Jerome asserts in his tract The Perpetual Virginity of Blessed Mary, as an answer to Helvidius, 
Title: James, brother of Jesus
Content:  ) with James being the elder sibling. James and his siblings were not children of Mary but were Joseph's children from a previous marriage. After Joseph's first wife died, many years later when he was eighty, "he took Mary (mother of Jesus)". According to Epiphanius the Scriptures call them "brothers of the Lord" to confound their opponents. One argument supporting this view is that it would have been against Jewish custom for Jesus to give his mother to the care of John (who is not at all suspected to be a blood relative of Jesus) if Mary had other living sons. This is because the eldest son would take 
Title: Brothers of Jesus
Content:  The New Testament names James the Just, Joses, Simon, and Jude as the brothers (Greek adelphoi) of Jesus. The same verses also mention unnamed sisters of Jesus. A verse in the Epistle to the Galatians (1:19) mentions seeing James, "the Lord's brother", and none other of the apostles except Peter, when Paul went to Jerusalem after his conversion. The "brothers of the Lord" are also mentioned, alongside (but separate from) Peter and the apostles in 1 Corinthians (9:5), in which it is mentioned they had wives. Some scholars claim Jesus' relatives may have held positions of authority in the Jerusalem area until Trajan excluded Jews from the new city he built on its ruins. 
Title: Jude, brother of Jesus
Content:  Mark 6:3 and Matthew 13:55 record the people of Nazareth saying of Jesus: "Is not this the carpenter, the son of Mary, the brother of James, and Joses, and of Judas, and Simon? and are not his sisters here with us?". Some Protestants, including R. V. Tasker and D. Hill, generally relate these brothers and sisters to the Matthew 1:25 indication that Joseph "did not know her till she had brought forth her firstborn Son" and the implication that Joseph and Mary had customary marital relations thereafter. But K. Beyer points out that Greek ἕως οὗ ('until') after a negative "often has no implication at all about what happened after the limit of the 'until' was reached". Many Christians (Roman Catholics, Eastern Orthodox, and some Protestants) believe that "brothers of Jesus" are not biological children of Mary, but step brothers or cousins, which is part of the doctrine of perpetual virginity of Mary.
Title: Brothers of Jesus
Content:  remained always a virgin; he held those who were called the brothers and sisters of Jesus were actually children of Mary's sister, another Mary, whom he considered the wife of Clopas. The terms "brothers" and "sisters" as used in this context are open to different interpretations, and have been argued to refer to children of Joseph by a previous marriage (the view of Epiphanius of Salamis ), children of Mary's sister, another Mary identified as Mary of Clopas (the view of Jerome), or according to a modern proposal, sons of Mary, the mother of James and Joses (not here identified with the Virgin Mary's sister), and Clopas, who according to Hegesippus was Joseph's brother.
Title: Brothers of Jesus
Content:  Judas, Justus, James, and Simon, and the names of the two daughters were Assia and Lydia. Years after his first wife died, he took Mary. Therefore, the brothers of Jesus would be the children of Joseph by his first wife. The Protoevangelium of James explicitly claims Joseph was a widower, with children, at the time that Mary is entrusted to his care. The Catholic Encyclopedia, citing the texts contained in the apocryphal writings, writes that: "When forty years of age, Joseph married a woman called Melcha or Escha by some, Salome by others; they lived forty-nine years together and had six children, two daughters 
Title: Brothers of Jesus
Content:  By the 3rd century, the doctrine of the perpetual virginity of Mary had become well established; important early Christian theologians such as Hippolytus (170–235), Eusebius (260/265–339/340) and Epiphanius (c. 310/320–403) defended it. By then the early church did not accept Mary had any children apart from Jesus. Eusebius and Epiphanius held these children were Joseph's children from a previous marriage. Epiphanius adds Joseph became the father of James and his three brothers (Joses, Simeon, Judah) and two sisters (a Salome and a Mary or a Salome and an Anna) with James being the elder sibling. James and his siblings were not children of Mary but 
Title: Brothers of Jesus
Content:  Explanations of the true relationship of the "brothers" of Jesus within his immediate nuclear family fall primarily into several categories. The first, called "the most natural inference from the New Testament" by the Oxford Dictionary of the Christian Church, is that the brothers of Jesus may have been sons of Mary and Joseph, born after Christ: Because of the conflict of this reconstruction with the doctrine of the perpetual virginity of Mary, several alternatives are common. Epiphanius made them children of Joseph by a former marriage: Other reconstructions would make them more distant relatives, the children of 'Mary, mother of James and Joses' by Clophas, though these are linked to Mary and Joseph in different ways. St. Jerome would have this Mary be a sister of the Virgin Mary: A modern reconstruction would likewise make them cousins, but rather than having the two Marys be siblings, it would follow Hegesippus in making Clophas brother of Joseph:
Title: James, brother of Jesus
Content:  Jesus' brothers – James as well as Jude, Simon and Joses –  are named in Matthew 13:55 and Mark 6:3 and mentioned elsewhere. James's name always appears first in lists, which suggests he was the eldest among them. In Jewish Antiquities (20.9.1), Josephus describes James as "the brother of Jesus who is called Christ". Interpretation of the phrase "brother of the Lord" and similar phrases is divided between those who believe that Mary had additional children after Jesus and those who hold the perpetual virginity of Mary (Catholics, Eastern Orthodox, and some Protestants, such as many Anglicans and some Lutherans). The only Catholic doctrine which has been defined regarding the "brothers of the Lord" is that they are not biological children of Mary; thus, Catholics do not consider them as siblings of Jesus. Near contemporary sources insist that James was a "perpetual virgin" from the womb, a term which according to Robert Eisenman was later converted to his mother, Mary.

Question: who were jesus siblings?
Answer: Jude the Apostle.