'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 Ahijah, the son of Ahitub, brother of Ichabod, the son of Phinehas, the son of Eli, the priest of the Lord in Shiloh, who had the ephod. And the people had no idea that Jonathan had 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 oldest brother, hearing what David said to the men, was moved to wrath against David, and said, Why have you come here? Into whose care have you given that little flock of sheep in the waste land? I have knowledge of your pride and the evil of your heart, you have come down to see the fight.

And say this to my brother, May all be well for you: peace be to you and your house and all you have.

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