'Brother' in the Bible

Paul, a prisoner of Jesus Christ, and Timothy our brother, unto Philemon our dearly beloved, and fellowlabourer,

For we have great joy and consolation in thy love, because the bowels of the saints are refreshed by thee, brother.

Not now as a servant, but above a servant, a brother beloved, specially to me, but how much more unto thee, both in the flesh, and in the Lord?

Yea, brother, let me have joy of thee in the Lord: refresh my bowels in the Lord.