Theophylact of Ohrid, on Jude 1:1

“Jude, the servant of Jesus Christ, and brother of James: to them that are beloved in God the Father, and preserved in Jesus Christ, and called.”

“In my opinion, it was sufficient for this apostle, as proof of his dignity, after having called himself a servant of Christ, to also point to his kinship with James. For James was praised by all for his virtue. This circumstance was bound to earn this apostle greater trust from his listeners regarding the teaching of the word, since it is doubtful that one who shared in birth and blood would prove to be very far in character from the one with whom he shared kinship, especially one who serves the same Master Christ and bears the burden of servitude equally with his blood relative.”

Imported from an open dataset — not yet checked against the printed edition.