'Brethren' in the Bible

And Joseph dieth, and all his brethren, and all that generation;

And it cometh to pass, in those days, that Moses is grown, and he goeth out unto his brethren, and looketh on their burdens, and seeth a man, an Egyptian, smiting a man, a Hebrew, one of his brethren,

And Moses goeth and turneth back unto Jethro his father-in-law, and saith to him, 'Let me go, I pray thee, and I turn back unto my brethren who are in Egypt, and I see whether they are yet alive.' And Jethro saith to Moses, 'Go in peace.'