'Brethren' in the Bible

And Joseph died, and all his brethren, and all that generation.

And it came to pass in those days, when Moses was grown, that he went out to his brethren and looked on their burdens; and he saw an Egyptian smiting a Hebrew, one of his brethren.

And Moses went and returned to Jethro his father-in-law, and said to him, Let me go, I pray thee, and return to my brethren who are in Egypt, that I may see whether they are yet alive. And Jethro said to Moses, Go in peace.