'Brother' in the Bible

Paul, an Apostle of Jesus Christ, by the purpose of God, and Timothy our brother,

Being gentle to one another and having forgiveness for one another, if anyone has done wrong to his brother, even as the Lord had forgiveness for you:

Tychicus will give you news of all my business: he is a dear brother and true servant and helper in the word;

And with him I have sent Onesimus, the true and well-loved brother, who is one of you. They will give you word of everything which is taking place here.

Aristarchus, my brother-prisoner, sends his love to you, and Mark, a relation of Barnabas (about whom you have been given orders: if he comes to you, be kind to him),

And Jesus, whose other name is Justus; these are of the circumcision: they are my only brother-workers for the kingdom of God, who have been a comfort to me.