The population of the Golden Horde was largely a mixture of Turks and Mongols who adopted Islam later, as well as smaller numbers of Finno-Ugrians, Sarmato-Scythians, Slavs, and people from the Caucasus, among others (whether Muslim or not). Most of the Horde's population was Turkic: Kipchaks, Cumans, Volga Bulgars, Khwarezmians, and others. The Horde was gradually Turkified and lost its Mongol identity, while the descendants of Batu's original Mongol warriors constituted the upper class. They were commonly named "the Tatars" by the Russians and Europeans. Russians preserved this common name for this group down to the 20th century. Whereas most members of this group identified themselves by their ethnic or tribal names, most also considered themselves to be Muslims. Most of the population, both agricultural and nomadic, adopted the Kypchak language, which developed into the regional languages of Kypchak groups after the Horde disintegrated.