'Brother' in the Bible

And Ananias departed, and entered into the house; and laying his hands on him said, Brother Saul, the Lord, even Jesus, who appeared unto thee in the way which thou camest, hath sent me, that thou mayest receive thy sight, and be filled with the Holy Spirit.

And he killed James the brother of John with the sword.

And they, when they heard it, glorified God; and they said unto him, Thou seest, brother, how many thousands there are among the Jews of them that have believed; and they are all zealous for the law:

came unto me, and standing by me said unto me, Brother Saul, receive thy sight. And in that very hour I looked up on him.