'Brother' in the Bible

Paul, called to be an apostle of Jesus Christ through the will of God, and Sosthenes our brother,

My brothers, it is because of you that I have taken Apollos and myself as examples of these things, so that in us you might see that it is not wise to go farther than what is in the holy Writings, so that no one of you may be lifted up against his brother.

For who made you better than your brother? or what have you that has not been given to you? but if it has been given to you, what cause have you for pride, as if it had not been given to you?

But now I have written unto you not to keep company, if any man that is called a brother be a fornicator, or covetous, or an idolater, or a railer, or a drunkard, or an extortioner; with such an one no not to eat.

Does any one of you, when he has a complaint (civil dispute) with another [believer], dare to go to law before unrighteous men (non-believers) instead of [placing the issue] before the saints (God’s people)?

I say this to put you to shame. Has it come to this, that there does not exist among you a single wise man competent to decide between a man and his brother,

But brother goeth to law with brother, and that before the unbelievers.

But to the rest speak I, not the Lord: If any brother hath a wife that believeth not, and she be pleased to dwell with him, let him not put her away.

For the unbelieving husband is sanctified in the wife, and the unbelieving wife is sanctified in the brother; since otherwise indeed your children are unclean, but now they are holy.

But if the unbelieving depart, let him depart. A brother or a sister is not under bondage in such cases: but God hath called us to peace.

And through thy knowledge shall the weak brother perish, for whom Christ died?

Wherefore, if meat make my brother to offend, I will eat no flesh while the world standeth, lest I make my brother to offend.

As touching our brother Apollos, I greatly desired him to come unto you with the brethren: but his will was not at all to come at this time; but he will come when he shall have convenient time.