There are three children of Jesus shown in the New Testament. Now that the internet is all hot about Jesus having children because of a fictional story that is clearly about Joseph of the Coat of Many Colors, I thought I should lay out the proofs for the existence of the three children of Jesus. I will not waste time with the fact that Jesus was married to Mary Magdalene because most open minded people have accepted this from Dan Brown's fictional book.
Instead I will begin with the ceremony that occurred in March 33 AD just days before his Crucifixion: (Matt 26:6-13, Mark 14:3-9,John 12:1-8) "A woman ('Mary' according to John 12:03 ) having an alabaster box of ointment, very precious, poured it on his head as he is reclining (at supper)". The anointing of Jesus, a descendant of King David, by Mary Magdalene (not Mary of Bethany who is the same as her) was announcing to him that she was three months pregnant.
This allows for my translation of what Jesus said on the cross. The scene is in John 19:25, "And there stood by the cross of Jesus: his mother (Mother Mary), the sister of the mother of him (Helena, sister in law to Mother Mary as she was the mother of Mary Magdalene - See Clementine Recognitions and Homilies), Mary of Cleopas (betrothed of Jesus' younger brother James having the title Cleopas from his father Joseph -- See Road to Emmaus), and Mary Magdalene."
John 19:26 "Jesus, then perceiving the mother (Mary Magdalene, not his mother Mary) and the disciple standing by, whom Jesus loved (John Mark-Bartholomew), is saying to the mother of him (the mother pregnant with his child), Woman, Behold the son of you! (his expected son inside Mary Magdalene's belly)." (Imagine Jesus in pain on the cross, taking joy that his son would live on after his death!)
Ah! But it wasn't a son, but a daughter born in September 33 AD. She was named Tamar, the name of the virgin daughter of King David. In its Greek form it was Damaris as a follower of St. Paul (Acts 17:34) "But some men joined him and believed, among whom also were Dionysius the Areopagite and a woman named Damaris and others with them". She took as her second baptismal name: Phoebe and married Paul (Romans 16:1) "I commend unto you Phoebe our sister, which is a servant of the church which is at Cenchrea"; (Philippians 4:3) "And I intreat thee also, true yokefellow, help those women which labored with me in the gospel, with Clement also, and with other my fellow-laborers, whose names are in the book of life."
As to his two sons, there are two places that give the hint about their births. Since Jesus' first child was a girl, Jesus had to wait three years to have sex in order to have another child according Essene rules of celibacy and then six years after having a boy to try for another. In June 37 AD, Jesus Justus is born (Acts 6:7) "And the Word of God Increased" (Jesus was known as the Word (John 1:1) "In the beginning was the Word".)
Acts 12:13,14 Mary Magdalene is 9 months pregnant March, 44 AD a maid named Rhoda (Magdalene) came to answer; recognizing Peter's voice, in her joy (pregnant). In April 44 AD, a boy is born (Joseph of Arimathea of British fame) (Acts 12:24) "But the Word of God grew and multiplied."
To understand the importance of Jesus' first son Jesus Justus (Colossinans 4:11) "and Jesus who is called Justus", one must look at the Pentecost where they are voting on the replacement for the traitor Judas (Acts 1:23) "And they proposed two: Joseph called Barsabas, who was surnamed Justus, and Matthias." This Joseph was James, the younger brother of Jesus and thus the crown prince of the line of David. Once Jesus had a son Jesus he would become the crown prince, thus replacing James. Incidentally Matthias was Barnabas (Clementine Recollections LX:55) who can be associated with Joses (Jesus' younger brother after James).
You probably are wondering how Jesus could have had children if he died on the cross, but I refer you to Eusebius, Bishop of Caesarea about the year 314 A.D, (Fragments Of Papias, Church History XXXIX 8-10) quoted here:
"It is worth while however to add to the words of Papias given above other passages from him, in which he records some other wonderful events likewise, as having come down to him by tradition. That Philip the Apostle resided in Hierapolis with his daughters has been already stated; but how Papias, their contemporary, relates that he had heard a marvellous tale from the daughters of Philip, must be noted here. For he relates that in his time a man rose from the dead, and again he gives another wonderful story about Justus who was surnamed Barsabas, how that he drank a deadly poison, and yet, by the grace of the Lord, suffered no inconvenience. Of this Justus the Book of the Acts records that after the ascension of the Saviour the holy Apostles put him forward with Matthias, and prayed for the (right) choice, in place of the traitor Judas, that should make their number complete. The passage is somewhat as follows; And they put forward two, Joseph, called Barsabas, who was surnamed Justus, and Matthias."
Papias, Bishop of Hierapolis 100 AD, has not fully recognized that 'Justus' would have been Jesus' title when his father Joseph was alive and that it was not James but Jesus who survived the poison on the cross. (John 19:29 "A jar full of sour wine stood there, so they put a sponge full of the sour wine on a hyssop branch and held it to his mouth.") Mary Magdalene, the 'daughter of Philip' (a nun under Philip) would have disguised the story as it was a secret. (You see Paul found that the Resurrection story worked well with converts and, after all, it really was like a resurrection to survive a crucifixion.)