The large number of Dacian/Moesian davae (town names end in '-dava' or '-deva') across entire Moesia, parts of Thrace and Dalmatia, indicates a much closer linguistic affinity between Dacian and Moesian languages, than between Moesian and Thracian, hinting to a much closer connection between Dacians and Moesians. The distinctly Thracian -para and -bria endings for town names are mostly present south of Moesia, making the Balkan Mountains (Haemus Mons) the linguistic border between Daco-Moesian and Thracian languages and cultures.
Map of Dacia, Moesia and surroundings during Burebista's campaigns
The close Dacian-Moesian connection is further emphasized by the fact that significant areas of Moesia were part of Burebista's Dacian kingdom formed by creating a union of related Geto-Dacian, Moesian and Thracian tribes. Additionally, after the Roman conquest of Moesia, the Geto-Dacians constantly raided across the Danube, under kings like Duras and Diurpaneus, harassing Roman troops and attempting to regain lost territory.