the bible claims that he had
Some people claim that Jesus had brothers, which means his mother, Mary, did not remain a virgin after Jesus’ birth. To support this, they quote Mk 6:17 “Is he not the carpenter, the son of Mary, and the brother of James and Joses and Judas and Simon? Are not his sisters here with us? And they took offense at him.”
John 19:25 “Standing by the cross of Jesus were his mother and his mother’s sister, Mary, the wife of Clophas, and Mary Magdela.
Mt 27:56 “Among them were Mary Magdalene and Mary the mother of James and Joseph, and the mother of the sons of Zebedee”.
MK 15:40 “There were also women looking on from a distance. Among them were Mary Magdalene, Mary the mother of the younger James and of Joses, and Salome.”
MK 15:47 “Mary Magdalene and Mary the mother of Joses watched where he was laid.”
Lk 5:9-10 “For astonishment at the catch of fish they had made seized him and all those with him, and likewise James and John, the sons of Zebedee, who were partners of Simon. Jesus said to Simon, ‘Do not be afraid; from now on you will be catching men’.
Mark 1:19, “He walked a little farther and saw James, the sons of Zebedee, and his brother John. They too were in a boat mending their nets.” .......
The rest of the Gospels show that the word “brother” means a male relative not necessarily a sibling. Also, “sister” means a female relative. Eusebius of Caesarea’s church history, Book 3, Chapter 11
(http://www.cbn.org/bibleresources/theology/eusebius/churchhistory/eusebius-b3-12.asp) says that Joseph, foster father of Jesus, was a brother of Clophas. This would make James and Joseph (Joses) first cousins to Jesus and Mary’s sister, Mary the wife of Clophas, was a sister-in-law, not a sibling (John 19:25).
Looks like he had no brothers just some friends.
But let me tell you something.
It doesnt matter anyway because the bible is just a book of a imagined story someone had. And the people took it further.