Bible documentation/history?

Jewish family lineage was recorded through the male line of descendants. As a result the geneology of Jesus ended at His death. He had no wife, no children. His half brothers probably did have their own geneologies, many of which were often passed down verbally. The geneology of Jesus was only significant before his death, to fulfill the prophecies of the Old Testament--proving his Messiahship. We know that Mary was taken care of by the half-brother of Jesus as by Jesus own words on the cross. Historic legend tells us that She went with him to Ephesis and lived there until she died. The geneology of her children was not significant because they were not the Messiah. Only Jesus was. Now all believers have the right to become a part of the family of God through salvation and repentance. The Bible teaches us that we become heirs and joint heirs with Jesus Christ via adoption into the family. All that is His becomes ours. We become part of the family of God.

Who are you referencing when you say him? If you mean Jesus, Christians don't believe he ever had children, so his line ended there. If you mean his half-brothers and such, they're unimportant.

Edit:

Except to Catholics, they see one as a Saint I think.