The ethnic composition of Kosovo's population during this period included Serbs, Albanians, and Vlachs along with a token number of Greeks, Armenians, Saxons, and Bulgarians, according to Serbian monastic charters or chrysobulls (Hrisovulja). A majority of the given names in the charters are overwhelmingly Serbian (Of 24,795 names, 23,774 were ethnic Serb names, 470 of Roman origin, 65 of Albanian origin and 61 of Greek origin).
The essentially Serbian composition of medieval Kosovo's population is corroborated by Ottoman defters, showing that Serbs were majority until the 17th century.
1455: Turkish cadastral tax census (defter) of the Brankovic District (covering most of present-day Kosovo) recorded:
13,693 adult males,
14,087 household heads (480 widows and 13,607 adult males).
Totally there were around 75,000 inhabitants in 590 villages comprising modern-day Kosovo.
Turkish defter did not give any data on ethnicity. However, Yugoslav and Serbian sholars have researched ethnic structure of Kosovo population. According to them there were:
13,000 Serb dwellings present in all 480 villages and towns
75 Vlach dwellings in 34 villages
46 Albanian dwellings in 23 villages
17 Bulgarian dwellings in 10 villages
5 Greek dwellings in Lauša, Vucitrn
1 Jewish dwelling in Vucitrn
1 Croat dwelling