'Brother' in the Bible

So Ananias departed and entered the house, placed his hands on Saul and said, "Brother Saul, the Lord Jesus, who appeared to you on the road as you came here, has sent me so that you may see again and be filled with the Holy Spirit."

He had James, the brother of John, executed with a sword.

When they heard this, they praised God. Then they said to him, "You see, brother, how many thousands of Jews there are who have believed, and they are all ardent observers of the law.

came to me and stood beside me and said to me, 'Brother Saul, regain your sight!' And at that very moment I looked up and saw him.