Brother

The Hebrew word is used in various senses in the Old Testament, as,

• Any kinsman, and not a mere brother; e.g. nephew, (Genesis 13:8; 14:16) husband, (Song of Solomon 4:9)
• One of the same tribe. (2 Samuel 19:13)
• Of the same people, (Exodus 2:11) or even of a cognate people. (Numbers 20:14)
• An ally. (Amos 1:9)
• Any friend, (Job 5:15)
• One of the same office. (1 Kings 9:13)
• A fellow man. (Leviticus 19:17)
• Metaphorically of any similarity, as in (Job 30:19) The word adelphos has a similar range of meanings in the New Testament.