'Brethren' in the Bible

To the saints and faithful brethren in Christ which are at Colosse: Grace be unto you, and peace, from God our Father and the Lord Jesus Christ.

For I would have you know in how severe a struggle I am engaged on behalf of you and the brethren in Laodicea and of all who have not known me personally,

For I can bear witness to the deep interest he takes in you and in the brethren at Laodicea and in those at Hierapolis.

Salute the brethren which are in Laodicea, and Nymphas, and the church which is in his house.