http://cyberleninka.ru/article/n/proishozhdenie-hunnu-v-svete-dannyh-arheologii-antropologii-i-analiza-pismennyh-istochnikov-1
Световными ученными давным-давно доказано, что Сяньби - это болгарское племя савиры, а
Ухуань - булгарское племя авары:
Pritsak (1976, 1989) seems confident in seeing Xianbei as *Säbi-r, where -r being a plural suffix, and connecting it with Sibir (< Σάβιρ- *Säbir).
Chinese official historiography of the ancient and early medieval period used two generic designations for «barbarians» to the northwest: Hsiung-nu and Tung Hu. The Tung Hu or «Eastern barbarians» were known from the third century B.C.E., and later developed two branches: the Wu-huan, first mentioned in 78 B.C.E., and the Hsien-pi, documented from 45 C.E. Chinese historical phonology, which is now a precise and reliable discipline [9], allows us to reconstruct the ancient pronunciation of the two designations: these are *ahwar (= Avar) for the Wu-huan, and *säbir, säbär (> Sibir, hence Siberia) for the Hsien-pi [10].
The leading clans of both the Jou-jan in the steppe and the Tabgach (T'o-pa) Wei dynasty in China (386-057) originated from the Hsien-pi and both used a Proto-Mongolian language as their lingua franca [11]. The European Avars were not directly connected with the real Avars, but, as contemporary Byzantine sources clearly state, consciously imitated them, especially by copying the way they plaited their hair [12], in order to gain for themselves the prestige the true Avars, the Wu-huan of Chinese sources, had enjoyed among the steppe peoples [Pritsak 2009, 3-4].
The identification Juan-juan = Avar is classical, comes from De Guignes = Desguignes [1], and I see no reason to doubt it (B. Lukács).
http://bolgnames.com/Images/Osmanids_2.1.pdf
http://bolgnames.com/Images/Principles.pdf