'Brother' in the Bible

And Saul's father's brother said to him and his servant, Where have you been? And he said, Searching for the asses: and when we saw no sign of them, we came to Samuel.

And Ahiah, the son of Ahitub, Ichabod's brother, the son of Phinehas, the son of Eli, the LORD'S priest in Shiloh, wearing an ephod. And the people knew not that Jonathan was gone.

The name of Saul's wife was Ahinoam, the daughter of Ahimaaz; the captain of his army was Abner, the son of Ner, brother of Saul's father.

And Eliab his eldest brother heard when he spake unto the men; and Eliab's anger was kindled against David, and he said, Why camest thou down hither? and with whom hast thou left those few sheep in the wilderness? I know thy pride, and the naughtiness of thine heart; for thou art come down that thou mightest see the battle.

And he said, Let me go, I pray thee; for our family hath a sacrifice in the city; and my brother, he hath commanded me to be there: and now, if I have found favour in thine eyes, let me get away, I pray thee, and see my brethren. Therefore he cometh not unto the king's table.

Then you will say to my brother, "Peace to you and your house! Peace to all that is yours!

Then answered David and said to Ahimelech the Hittite, and to Abishai the son of Zeruiah, brother to Joab, saying, Who will go down with me to Saul to the camp? And Abishai said, I will go down with thee.