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http://www.geocities.ws/protoillyrian/serb.html
Name of Sabar (Serb,Serboi,Sabar)
It has been determined through the unorganized information in various foreign resources that this Turkish community had played an important role in the Western Siberia and the northern region of the Caucasus in the 5th-6th centuries DC. This Turkish community was named as Sabar, Sabir, and Savir in the Byzantine resources and as Savır, Sabr, S(a)bir, Sibir, etc. in the Armenian, Syrian Christian, and Islamic resources.
The allegations stating that the Sabar people were of Slav or Mongolian or Finno-Ugrian origin had become out-of-date. Today, it has been understood that they were Turks in origin in respect of the names that they hold and the historical and cultural characteristics. As a result of the labial attraction in various languages, the word of Sabar has been observed in various forms..