'Brother' in the Bible

and Ahijah, the son of Ahitub, Ichabod’s brother, the son of Phinehas, the son of Eli, the priest of the Lord at Shiloh, was wearing an ephod. And the people did not know that Jonathan had gone.

Now Eliab his oldest brother heard when he spoke to the men; and Eliab’s anger burned against David and he said, “Why have you come down? And with whom have you left those few sheep in the wilderness? I know your insolence and the wickedness of your heart; for you have come down in order to see the battle.”

for he said, ‘Please let me go, since our family has a sacrifice in the city, and my brother has commanded me to attend. And now, if I have found favor in your sight, please let me get away that I may see my brothers.’ For this reason he has not come to the king’s table.”

Then David said to Ahimelech the Hittite and to Abishai the son of Zeruiah, Joab’s brother, saying, “Who will go down with me to Saul in the camp?” And Abishai said, “I will go down with you.”