Louis XXIV
Le Roi Soleil
I'll be shocked if Atilla's Court is not a military CS. Then again, doesn't really fit a military CS, should be outright barbs if anything, and no existing or added CS trait would match that.
Looking at the screenshot with Atilla's Court; unless they were conquered really early, there does not seem to be a way to fit three civs there. So, in that context, I agree it's probably a city-state. However, I would not necessarily be surprised either way.
If light blue is Mayan, then Zulu is in, because you can clearly see yellow units that look like Impis moving over hills.
BTW, which screenshot?
Regarding jewelry. I wonder if the luxuries for mercantile city-states change randomly or if they are specifically picked. I'm willing to be it's the former since I don't think Tyre is necessarily associated with Jewelry. They're actually associated with Dyes, but those are already in the game. I like that it's manufactured luxuries. That helps make things a bit more unique and explains why you need the city-state to still be there rather than just conquer them. It's also possible you get more than one so you can sell the excess.