As for the city list, there are no city lists. Well they kind of exist but they are referenced only if you found a city very far from your own territory (and that means found not just conquer) so city lists are kind of pointless. There is only city name map and you can edit that one if you want (post the edited version here and I will include it).
Yeah I know
But if the city map is not very well developed or far from complete - which is the case IMO with the Hungarian one, then you quite a few times found cities which are not on it. And then of course the game chooses a name from the actual city list, which has Utica, Thapsus, Kerkouane, Sicca, etc. in the first few places.
I had Utica in all of my games, and it doesn't sound very nice for Hungary
IIRC if you don't like the spot for Belgrade/Nandorfehervar, and you raze it and settle an adjacent tile, or just expand into Bulgarian or Austrian territory, you get a city from the list
I can easily rename them as I'm hungarian, but I remember reading a few comments about this earlier by other forum members too...
So I plan to update the city name map, but also write a city list with unused hungarian cities (like it's done for Spain and some other civs), if occasionly someone settle outside that map
EDIT: Checking the city map right now, and I was wrong about Nandorfehervar. Anyway, my point stands still, I would like to expand it a little (and change a few names if you don't mind)
I have to change only the RFCEmaps.py file, or are the name stored somewhere else too?