'Brethren' in the Bible

I do not want you to be unaware, brethren, that often I have planned to come to you (and have been prevented so far) so that I may obtain some fruit among you also, even as among the rest of the Gentiles.

Or do you not know, brethren (for I am speaking to those who know the law), that the law has jurisdiction over a person as long as he lives?

Therefore, my brethren, you also were made to die to the Law through the body of Christ, so that you might be joined to another, to Him who was raised from the dead, in order that we might bear fruit for God.

So then, brethren, we are under obligation, not to the flesh, to live according to the flesh—

For those whom He foreknew, He also predestined to become conformed to the image of His Son, so that He would be the firstborn among many brethren;

For I could wish that I myself were accursed, separated from Christ for the sake of my brethren, my kinsmen according to the flesh,

Brethren, my heart’s desire and my prayer to God for them is for their salvation.

For I do not want you, brethren, to be uninformed of this mystery—so that you will not be wise in your own estimation—that a partial hardening has happened to Israel until the fullness of the Gentiles has come in;

Therefore I urge you, brethren, by the mercies of God, to present your bodies a living and holy sacrifice, acceptable to God, which is your spiritual service of worship.

And concerning you, my brethren, I myself also am convinced that you yourselves are full of goodness, filled with all knowledge and able also to admonish one another.

Now I urge you, brethren, by our Lord Jesus Christ and by the love of the Spirit, to strive together with me in your prayers to God for me,

Greet Asyncritus, Phlegon, Hermes, Patrobas, Hermas and the brethren with them.

Now I urge you, brethren, keep your eye on those who cause dissensions and hindrances contrary to the teaching which you learned, and turn away from them.