<Mask of the Twisted Path> might count in that case, but I think his others would be okay since they don't refer to an organization within w40k, children of the stars are a generic name for the Eldar, and the swords of Vaul is a reference to a story.
Well what if you fudged it a bit and came up with Lore-y names that aren't actual faction names? Like you can stick "Masque of the" in front of almost anything and it adds gravitas. "Masque of the Crimson Zephyr" "Masque of the Whispered Aegis" "Masque of the Sausage Sandwich" OK. Maybe not the last one! Is very good actually considering all the virtual Eldar that will die in this game.
