Jesus siblings (Matthew 13:55-56)
Matthew 13 mentions four brothers of Jesus: James, Joses, Simon, and Judas and His sisters. The Bible Dictionary clarifies that the Greek word for sisters used in this verse indicates more than two. So Jesus had at least 7 siblings (Source).
But did these siblings believe in Jesus?
According to the original Greek in John 7:5 and Acts 1:14 it appears that Jesus’ brothers did not believe in His role as the Messiah until after His resurrection (Source).