※ Note: character placement does not indicate canonical locations of hometowns, only a visual guide. Example: Deuce’s hometown is in the south of the Queendom of Roses but he is depicted as standing in the back so as not to hide Riddle.
It is maybe possible that, beyond country names, we only know the specific locations for seven people:
Riddle and Trey: Crimson City (Queendom of Roses capital city)
Deuce: Clock Town
Epel: Harveston
Kalim and Jamil: Silk City
Leona: Sunrise City
Not shown on the map above are Crowley, Sam, Kalim and Jamil, as Crowley’s hometown is a mystery, while Sam, Kalim and Jamil’s places are not shown on the map.
The above information is directly from the game itself, screenshots compiled here:
Twisted Wonderland Reference Note 