'Brother' in the Bible

and Ahiah, son of Ahitub, brother of I-Chabod, son of Phinehas son of Eli priest of Jehovah in Shiloh, bearing an ephod; and the people knew not that Jonathan hath gone.

And Eliab, his eldest brother, heareth when he speaketh unto the men, and the anger of Eliab burneth against David, and he saith, 'Why is this -- thou hast come down! and to whom hast thou left those few sheep in the wilderness? I have known thy pride, and the evil of thy heart -- for, to see the battle thou hast come down.'

and he saith, Send me away, I pray thee, for a family sacrifice we have in the city, and my brother himself hath given command to me, and now, if I have found grace in thine eyes, let me go away, I pray thee, and see my brethren; therefore he hath not come unto the table of the king.'

And David answereth and saith unto Ahimelech the Hittite, and unto Abishai son of Zeruiah, brother of Joab, saying, 'Who doth go down with me unto Saul, unto the camp?' and Abishai saith, 'I -- I go down with thee.'