James & Jude I believe were depicted as "brothers" as in fellow Christians are "Brothers and Sisters".
But not ACTUAL "brothers" or "half brothers".
Otherwise I think that would negate the term "Bride ever Virgin". I mean obviously the Theotokos, the mother of God, would not be a virgin right now if she had other children. Also if we would consider Jude & James to have the same blood as Jesus, that can open up a huge can of worms of possible heretical thought.