'Brethren' in the Bible

And Adonijah sacrificed sheep and oxen and fatted cattle by the stone of Zoheleth, which is by En-rogel, and invited all his brethren, the king's sons, and all the men of Judah, the king's servants;

Thus saith Jehovah: Go not up, nor fight with your brethren, the children of Israel; return every man to his house, for this thing is from me. And they hearkened to the word of Jehovah, and returned to depart, according to the word of Jehovah.