BilliardsBall
Veteran Member
Don't get too carried away here because the word for "brother" in Koine Greek also included male cousins (extended family).
BTW, I think it's his "brother" James that actually was from a different Mary, but I don;t have the time to look it up.
ἀδελφός, (οῦ, ὁ (from ἆ copulative and δελφύς, from the same womb; cf. ἀγάστωρ) (from Homer down);
You can indeed use a different word for brother that means "in the same congregation" but not here.