no clear picture of where the Illyrian-Thracian border was, Niš is mostly considered Illyrian territory. There are some close correspondences between Thracian and Albanian words. However, as with Illyrian, most Dacian and Thracian words and names have not been closely linked with Albanian (v. Hamp). Also, many Dacian and Thracian placenames were made out of joined names (such as Dacian Sucidava or Thracian Bessapara; see List of Dacian cities and List of ancient Thracian cities), while modern Albanian does not allow this. Many city names were composed of an initial lexical element affixed to -dava, -daua, -deva, -deba, -daba, or -dova, which meant "city" or "town" Endings on more southern regions are exclusively -bria ("town, city"), -disza, -diza, -dizos ("fortress, walled settlement"), -para, -paron, -pera, -phara ("town, village"). Most Illyrian names are composed of a single unit; many Thracian ones are made of two units joined together. Several Thracian place-names end in -para, for example, which is thought to mean 'ford', or -diza, which is thought to mean 'fortress'. Thus in the territory of the Bessi, a well-known Thracian tribe, we have the town of Bessapara, 'ford of the Bessi'. The structure here is the same as in many European languages: thus the 'town of Peter' can be called Peterborough, Petrograd, Petersburg, Pierreville, and so on. But the crucial fact is that this structure is impossible in Albanian, which can only say 'Qytet i Pjetrit', not 'Pjeterqytet'. If para were the Albanian for 'ford', then the place-name would have to be 'Para e Besseve'; this might be reduced in time to something like 'Parabessa', but it could never become 'Bessapara'. And what is at stake here is not some superficial feature of the language, which might easily change over time, but a profound structural principle. This is one of the strongest available arguments to show that Albanian cannot have developed out of Thracian or Dacian. Bulgarian linguist Vladimir I. Georgiev posits that Albanians descend from a Dacian population from Moesia, now the Morava region of eastern Serbia, and that Illyrian toponyms are found in a far smaller area than the traditional area of Illyrian settlement. According to Georgiev, Latin loanwords into Albanian show East Balkan Latin (proto-Romanian) phonetics, rather than West Balkan (Dalmatian) phonetics. Combined with the fact that the Romanian language contains several hundred words similar only to Albanian, Georgiev proposes that Albanian formed between the 4th and 6th