'Brethren' in the Bible

I will cast you out of My sight, as I have cast out all your brothers (relatives through Jacob), all the descendants of Ephraim.

“For even your [tribal] brothers and the household of your father,Even they have dealt treacherously (unfaithfully) with you;Indeed they are [like a pack of hounds] howling after you.Do not believe them, although they may say kind words and promise you good things.”

thus says the Lord concerning the king who sits on the throne of David, and concerning all the people who live in this city, your brothers (fellow people of Judah) who did not go with you into captivity—

But ten men who were among them said to Ishmael, “Do not kill us! We have stores of wheat and barley and oil and honey hidden in the field.” So he stopped and did not kill them along with their companions.

“But I have stripped Esau (Edom) bare;I have uncovered his hiding placesAnd he cannot hide himself.His descendants have been destroyed along with his brothers (relatives) and his neighbors;And he is no more.