'Brethren' in the Bible

The five men came back [home] to their brothers at Zorah and Eshtaol, and their brothers said to them, “What do you have to report?”

Then the five men who had gone to scout the country of Laish said to their relatives, “Do you know that there are in these houses an ephod, teraphim, an image [of silver-plated wood], and a cast image [of solid silver]? Now therefore, consider what you should do.”

The sons of Israel went up and wept before the Lord until evening, and asked of the Lord, “Shall we advance again to battle against the sons of our brother Benjamin?” And the Lord said, “Go up against them.”

and Phinehas the son of Eleazar, the son of Aaron, ministered before it in those days), saying, “Shall I yet again go out to battle against the sons of my brother Benjamin, or shall I quit?” And the Lord said, “Go up, for tomorrow I will hand them over to you.”