From the Bible and from here: http://www.biblestudy.org/question/family-tree-of-jesus.html
Several New Testament scriptures confirm the fact that Jesus was not the only child of Joseph and Mary. See Matthew 13:55-56 :
“Isn’t this the carpenter’s son? Isn’t his mother’s name Mary, and aren’t his brothers James, Joseph, Simon and Judas? Aren’t all his sisters with us? . . . “ (New International Version Bible)
Notice here that Joseph, the husband of Mary, is not listed. It is probably because he had already died. A parallel account of these verses can be found in Mark 6:3. There is also mention of Jesus’ family in Matthew 12:47, John 2:12, and Acts 1:14.
What is the meaning of “brother” and “sister” in the Aramaic and the Greek in use at the time the gospels were written?
(shhhhh. don’t confuse them with facts.)