James is called the Lord's Brother. Jude is James' brother.
It is not strange at all. It follows the pattern of humility that James took. James is called the Lord's brother, but doesn't call himself the Lord's Brother. Look at the introductions to the two books. Same pattern with Jude.
James 1:1
James, a servant of God and of the Lord Jesus Christ, To the twelve tribes scattered among the nations: Greetings.
Jude 1:1
Jude, a servant of Jesus Christ and a brother of James, To those who have been called, who are loved by God the Father and kept by Jesus Christ:
It is not strange at all. It follows the pattern of humility that James took.
Right. So if I have two brothers, one is President of the U.S., and the other is a garbage truck driver named Fred, I would write down that I am the brother of Fred, not the President of the US?
I find that odd and telling that Jesus and James are NOT blood brothers.
Regards