Barsils ~ Barsilts (Greek: Βαρσὴλτ Barsilt; Old Turkic 𐰋𐰼𐰾𐰠 *Bersel or Bärsil/Barsïl; Old Tibetan: Par-sil), were a semi-nomadic Eurasian tribe of Turkic linguistic affiliation. Barsils might be identified with Bagrasik. Barsils are included in the list of steppe people living north of Derbend in the Late Antique Syrian compilation of Zacharias Rhetor, and are also mentioned in documents from the second half of the 6th century in connection with the westward migration of the Eurasian Avars. When the Avars arrived, according to Theophylact Simocatta, "the Barsilt (Barsilians), Onogurs, and Sabirs were struck with horror (...) and honoured the newcomers with brilliant gifts."
Recently, Singaporean scholar Yang Shao-yun also identifies Barsils with the Tiele tribe 白霫 Báixí (< MC *bˠæk̚-ziɪp̚). The Baixi 白霫 were mentioned as simply Xi 霫 in the late 8th-century encyclopaedia Tongdian as a detached stock of Xiongnu who dwelt near the Tungusic Mohe people in former Xianbei lands north of the Yellow River. Baixi could field over 10,000 soldiers, their customs somewhat resembled Göktürks' customs, and Baixi's leaders were title irkin, vassals of Eastern Turkic Khagan Xieli (頡利); however, Baixi later sent their irkin to China in the middle of the reign of Emperor Taizong of Tang (~ 636 CE) as a gesture of submission. Much later, the 14th-century chronicle History of Liao associated Baixi 白霫 with the Mongolic Kumo Xi (< MC *kʰuoH-mɑk̚-ɦei; 庫莫奚) in Zhongjing (中京). An 8th-century Old Tibetan list, written by five Tibetan explorers, possibly mentioned 庫莫奚 Kumoxi and 白霫 Baixi together as He-tse (奚霫 Xī-Xí in Liaoshi). However, the same Tibetan source distinguished the He-tse from the Par-sil and included Barsils in twelve Turkic tribes ruled by Qapaghan Qaghan.
Zuev (2002) also pointed out that Chinese records about the Western Turkic Kaganate c. 630 mentioned a tribe named "leopard khan" Barsqan (拔塞幹 MC. *b'uat-sai-kan > Mand. Basaigan), led by Tun-ashpa-[ra]-erkin, a member of five leaders of the "Nushibi" (弩失畢 < OT *Oŋ-Şadapït) right-wing tribes.
In an Armenian geography of the 7th century, the Barsils are described as living on an island, distinct from the Bulgars and Khazars and at odds with both nations. In addition, it describes them as possessing large flocks of sheep, supporting the notion that they were at least partly nomadic. Mikhail Artamonov theorized that "Barsilia" was located in northern Daghestan, but subsequent scholars have disputed this theory, as the sedentary local population of the relevant period and region appears to have been, for the most part, settled in permanent fortress-towns.
Some archeologists believe that the Barsils lived near the Volga delta, which would explain the Armenian reference to them as island-dwellers. This is supported by Theophanes' statement that the "populous people of the Khazars came out from the innermost parts of Bersilia in Sarmatia Prima." If indeed they lived on the lower Volga, they were almost certainly conquered by the Khazars, whose capital Atil was in the same region from the mid-8th century on.
Eventually at least part of the Barsil nation is believed to have settled in Volga Bulgaria. In the 10th century, ibn Rustah reported that the three nations of Volga Bulgaria were "Bersula", "Esegel", and "Bulgar". Thereafter the Barsils were likely assimilated by the Volga Bulgars.
- "Tariat Inscription", line 17, at Türik Bitig
- Klyashtorny, S. G. (1982) [www.jstor.org/stable/23657859 "The Terkhin Inscription"] in Acta Orientalia Academiae Scientiarum Hungaricae, vol. 36, no. 1/3, p. 345, 348 of pp. 335–366.
- Dimitrov, D. "Sabirs, Barsils, Belendzheris, Khazars", The Proto-Bulgarians north and west of the Black Sea. Varna, 1987. p. 8 of 64. pdf
- Theophylact Simocatta, Historiae VII.7. (1887) Carl de Boor's Teubner edition. p. 258 (in Greek)
- Yang, Shao-yun (2017). "Letting the Troops Loose: Pillage, Massacres, and Enslavement in Early Tang Warfare" in Journal of Chinese military History, 6 p. 31 of 1-52
- Du You. Tongdian, Vol. 200 Xi text: "霫，匈奴之別種，隋時通焉。與靺鞨為鄰，理潢水北，亦鮮卑故地。勝兵萬餘人。習俗與突厥略同。亦臣於頡利，其渠帥號為俟斤。 大唐貞觀中，遣渠帥內附。"
- Toqto'a et al. Liaoshi, Vol. 116 "奚、霫 [...] 國名。中京地也。" Tr. "Xī, Xí ... the name of a state in Zhongjing area."
- Venturi, Federica (2008). "An Old Tibetan document on the Uighurs: A new translation and interpretation". Journal of Asian History. 1 (42): p. 22 of 1-34
- Zuev, Yu. A., Rannie tyurki: ocherki istorii i ideologii, Dajk-Press, Almaty, 2004. p. 67
- Venturi, Federica (2008). "An Old Tibetan document on the Uighurs: A new translation and interpretation". Journal of Asian History. 1 (42): 21.
- Dobrovits, Mihály (2004). "The Thirty Tribes of the Turks". Acta Orientalia Academiae Scientiarum Hung. 57 (3): 257–262.
- Yu. Zuev, "The Strongest tribe - Izgil"//Historical and Cultural Relations Between Iran and Dasht-i Kipchak in the 13th through 18th Centuries, Materials of International Round Table, Almaty, 2004, p. 53, ISBN 9965-699-14-3
- Zakhoder B.N. Caspian corpus on Eastern Europe, Gorgan, and Volga Region in the 9th-10th Centuries, Moscow, 1967, Part 2, p. 102 In Russian