'Brethren' in the Bible

After this he descended to Capernaum, he and his mother and his brethren and his disciples; and there they abode not many days.

His brethren therefore said to him, Remove hence and go into Judaea, that thy disciples also may see thy works which thou doest;

for neither did his brethren believe on him.

But when his brethren had gone up, then he himself also went up to the feast, not openly, but as in secret.

Jesus says to her, Touch me not, for I have not yet ascended to my Father; but go to my brethren and say to them, I ascend to my Father and your Father, and to my God and your God.

This word therefore went out among the brethren, That disciple does not die. And Jesus did not say to him, He does not die; but, If I will that he abide until I come, what is that to thee?