'Brother' in the Bible

So Ananias departed and entered the house, and after laying his hands on him said, “Brother Saul, the Lord Jesus, who appeared to you on the road by which you were coming, has sent me so that you may regain your sight and be filled with the Holy Spirit.”

And he had James the brother of John put to death with a sword.

And when they heard it they began glorifying God; and they said to him, “You see, brother, how many thousands there are among the Jews of those who have believed, and they are all zealous for the Law;

came to me, and standing near said to me, ‘Brother Saul, receive your sight!’ And at that very time I looked up at him.