You already have two characters named Sojanèsc/Sojanèsca... Yet Sojane is the capital city, nè c'est pas? I find it very unbelievable that you have such a common name derived from people living in the capital. Note that bloodlines - and thus surnames - usually move rural>city and then die out in the urban environment to be replaced with new ones... you have a lot of Frenchmen named after obscure little villages and very few named after Paris. Sometimes in a colonial context you see people named (de) France and (de) Paris etc. but these are usually colonials who made their names up anyway. Or were given them on a whim. I very much doubt Dravia had a colonial empire. You see this not only in France but in pretty much every country of Europe, and especially in the East (barring situations like Vilnius and Krakow that have been cultural millieus for forever (and people named after those cities usually tend to be Jews, not being anti-semitic, just descriptive)) because our capitals tend to have been villages of a few thousands until very recently (say a century and a half ago). So there are very few Serbians named Beogradski, Croats named Zagrebski, Macedonians named Skopski, Slovaks named Bratislavski (hahahaha) etc. Hungarians have Buday but Buda was a huge HUGE city in medieval times... you paint the Dravians as a rural, noncosmopolitan folk and I doubt Sojane has left much of an impression on history. It's true a lot of Romanians bear the name Bucurescu but keep in mind Bucuresti is the plural of Bucurescu, which seems to have been a large clan so and so many years ago. They're not named after the city, quite the opposite. I doubt this is true for Sojane whatever your etymology of it is. "People of the Soj clan"? Kek.
Another criticism. You seem to have some misconceptions about Eastern Europe. The first, that redubbed blackmarket DVDs and other 90s kinda shit is still prevalent here, which it really isn't, we've modernized massively; the average Eastern European listens to more rap than folk and any phenomenon you'd find memetically popular in New York or Paris will be so in Prague and Chisinau, in the original English too! The era of isolation of the east is over. Now, I say we've modernized, of course we're still poor as fuck. And lots of suicides, other concomitant baggage reflecting the culture shift, etc. but the impression I get from you is that you think all the "Ivan Drago" stereotypes are still active. Secondly, you seem to think French-style villages and towns are how Eastern Europe works, with your guy being born in some few-thousands-strong winemaking town that's active and fun and they make wine even today, how quaint & pretty ... all the villages are empty. Only old people live there. It was a bit different in the 90s, though, I have friends who grew up in villages that had other children, and young adults (!) so I'll give you the benefit of the doubt.
My third and final question. How did these pseudo-French, who don't even sound particularly Eastern Romance, get to the middle of the pannonian plain without getting assimilated/exterminated/enslaved like all the other ethnicities who've tried it? Balaton to Budapest used to speak Slavic, there were Avars in the grasslands, probably some of the old Romano-Illyrian stock hanging around and yet when Arpad came all these people in the lowlands got Magyarized. Took a few hundred years, yeah, but still. The only people under Hungarian dominion who successfully resisted this were highland shepherds like the Slovaks and Vlachs, even successive waves of German colonists got assimilated early on (the ones we see in the ethnographic maps of ~1880 arrived there much later, most in the 16th century but with the overlordship and umbrage of the Austrian state behind them). Then whence your Dravians. Either they came as refugees from France or are some population of Romance shephards moved West - which isn't too unrealistic - but there's not much for herders to do in farmland unless the farmers get killed, which the Hungarian crown would not support, and anyway Dravian doesn't sound anything like Romanian/Aromanian/Megleno-Romanian/Istro-Romanian. And if they're French, it would take a massive number of them moving there to form a self-sustaining community. Some Byzantine emperor settled 30,000 Slavs in Anatolia and they assimilated, while 60,000 Kurds were moved to Mashhad and managed to survive as an ethnos to the present. Let's say 50,000 is more or less the minimum, how did they get to southern Hungary? What did the Hungarian crown/existing Hungarian peasantry there have to say about it? Tons of problems with that theory. Lastly you could say they're remnants of the native Romance population but that's impossible as I showed above.
PS: Eastern Europeans, especially bydlo ones like your specimen, get drunk for the first time before 10-11 y.o... "How could this be" you ask in a shocked tone from an enlightened Occidental viewing platform high in the clouds above North America, watching the world through red-white-and-blue tinted telescreens. Well, mate, the East is as it is. Mores and customs are very different here. I find occidental writers do too much projection when they portray foreign cultures; it's very close minded to believe all people act the same and have the same belief systems/general life milestones and ages when those occur etc. etc. I suppose they do so as a consequence of egalitarianism.
Slava, čĭstŭ, hrabrostĭ!