'Brother' in the Bible

I, John, your brother, who have a part with you in the trouble and the kingdom and the quiet strength of Jesus, was in the island which is named Patmos, for the word of God and the witness of Jesus.

And I went on my face before his feet to give him worship. And he said to me, See you do it not: I am a brother-servant with you and with your brothers who keep the witness of Jesus: give worship to God: for the witness of Jesus is the spirit of the prophet's word.

And he said to me, See you do it not; I am a brother-servant with you and with your brothers the prophets, and with those who keep the words of this book: give worship to God.