Zingaros, Roma, Tsingano (from Jacqueline Carey's Kusiel trilogy).
This may be useful and keep you on the straight and narrow! https://en.wikipedia.org/wiki/Romani_people#Romani_subgroups
I really do like this idea, I think in is both original and challenging... It reminds me somewhat of the world state of the Kushiel books, but I have a few quibbles...
Would a Vodun practitioner use middle eastern magic texts? I mean Vodun is animistic in nature and the lore is mostly...
I think you need to look up traditional Mediterranean forest and take it from there quercus or oak are a typical feature. Bear in mind that dependent on the historical period there have been changes.
This may be a good start: http://https://en.wikipedia.org/wiki/Mediterranean_Basin
Even more...
Currently reading Robert Harris's Lustrum after completing Imperium... I would recommend both books, one of my excuses is research for my current fantasy... For example how did Romans make and keep detailed written records? Which has been entertainingly answered in these novels...
The Brothers Karamazov made an impression, I also liked Fight Club, though that is a novella... The Three Musketeers was one of my favourites as a girl... The Secret History...
More traditional fantasy well ASoIaF was an eye opener and I really loved the first Kushiel trilogy as I did Robin...
Don't ask me... I bought the second one but couldn't get through the first few pages, and I am a dedicated reader, but it seemed turgid and alienatingly male-centric... But there you go.