The Pannonian Avars or Carpathian Avars ( AV-arz) were a confederation of Eurasian nomads. They were also known as the Obri (modern Russian: обры, Obry) in the chronicles of the Rus, the Abaroi or Varchonitai (Greek: Βαρχονῖται, romanized: Varchonitai), or Pseudo-Avars in Byzantine sources, and the Apar (Old Turkic: 𐰯𐰺) to the Göktürks. They established the Avar Khaganate, centred in the Carpathian Basin, from the late-6th to the early-9th centuries. They exerted influence and control over surrounding areas in Central, Eastern and Southeastern Europe.
The name "Pannonian Avars" (after Pannonia in the upper Danube basin where they eventually settled) is used to distinguish them from the Avars of the Caucasus, a separate people with whom the Pannonian Avars may or may not have had links. Although the name Avar first appeared in the mid-5th century, the Pannonian Avars entered the historical scene in the mid-6th century, on the Pontic–Caspian steppe as a people who wished to escape the rule of the Göktürks. They are probably best known for their invasions and destruction in the Avar–Byzantine wars from 568 to 626 and for their influence on the Slavic migrations to the Balkans.
Recent archaeogenetic studies indicate that the Pannonian Avars likely originated within the borders of present-day Mongolia, with primarily Ancient Northeast Asian ancestry, similar to the forebears of modern-day people from Mongolia and the Amur River region in Manchuria. This points to an initial rapid migration into the Carpathian Basin from the Eastern Eurasian Steppe. The Pannonian Avars' core may have been descended from the remnants of the Rouran Khaganate, which were accompanied by other Eurasian steppe peoples.
The earliest clear reference to the Avar ethnonym comes from Priscus the Rhetor (420s–after 472), who recounts that in c. 463 the Šaragurs and Onogurs were attacked by the Sabirs, who had been attacked by the Avars. In turn, the Avars had been driven off by people fleeing "man-eating griffins" coming from "the ocean" (Priscus Fr 40). Whilst Priscus' accounts provide some information about the ethno-political situation in the Don-Kuban-Volga region after the demise of the Huns, no unequivocal conclusions can be reached. Denis Sinor has argued that whoever the "Avars" referred to by Priscus were, they differed from the Avars who appear a century later, during the time of Justinian (r. 527–565).
The next author to discuss the Avars, Menander Protector, appeared during the 6th century and wrote of Göktürk embassies to Constantinople in 565 and 568. The Turks appeared angry at the Byzantines for having made an alliance with the Avars, whom the Turks saw as their subjects and slaves. Turxanthos, a Turk prince, calls the Avars "Varchonites" and "escaped slaves of the Turks", who numbered "about 20 thousand" (Menander Fr 43).
Many more, but somewhat confusing, details come from Theophylact Simocatta, who, in c. 629, describes the final two decades of the 6th century. In particular, he claims to quote a triumph letter from Turxanthos:
For this very Chagan had in fact outfought the leader of the nation of the Abdali (I mean indeed, of the Hephthalites, as they are called), conquered him, and assumed the rule of the nation. Then he [...] enslaved the Avar nation.
But let no one think that we are distorting the history of these times because he supposes that the Avars are those barbarians neighbouring on Europe and Pannonia, and that their arrival was prior to the times of the emperor Maurice. For it is by a misnomer that the barbarians on the Ister have assumed the appellation of Avars; the origin of their race will shortly be revealed.
So, when the Avars had been defeated (for we are returning to the account) some of them made their escape to those who inhabit Taugast. Taugast is a famous city, which is a total of one thousand five hundred miles distant from those who are called Turks, ... Others of the Avars, who declined to humbler fortune because of their defeat, came to those who are called Moukri (Goguryeo); this nation is the closest neighbour to the men of Taugast;
Then the Chagan embarked on yet another enterprise, and subdued all the Ogur, which is one of the strongest tribes on account of its large population and its armed training for war. These make their habitations in the east, by the course of the Til, which Turks are accustomed to call Melas. The earliest leaders of this nation were named Var and Chunni; from them some parts of those nations were also accorded their nomenclature, being called Var and Chunni.
Then, while the emperor Justinian was in possession of the royal power, a small section of these Var and Chunni fled from that ancestral tribe and settled in Europe. These named themselves Avars and glorified their leader with the appellation of Chagan. Let us declare, without departing in the least from the truth, how the means of changing their name came to them. [...]
When the Barsils, Onogurs, Sabirs, and other Hun nations in addition to these, saw that a section of those who were still Var and Chunni had fled to their regions, they plunged into extreme panic, since they suspected that the settlers were Avars. For this reason they honoured the fugitives with splendid gifts and supposed that they received from them security in exchange.
Then, after the Var and Chunni saw the well-omened beginning to their flight, they appropriated the ambassadors' error and named themselves Avars: for among the Scythian nations that of the Avars is said to be the most adept tribe. In point of fact even up to our present times the Pseudo-Avars (for it is more correct to refer to them thus) are divided in their ancestry, some bearing the time-honoured name of Var while others are called Chunni.
According to the interpretation of Dobrovits and Nechaeva, the Turks insisted that the Avars were only "pseudo-Avars", so as to boast that they were the only formidable power in the Eurasian steppe. The Göktürks claimed that the "real Avars" remained loyal subjects of the Turks, farther east. A political name *(A)Par 𐰯𐰻 was indeed mentioned in inscriptions honoring Kul Tigin and Bilge Qaghan, yet in Armenian sources (Egishe Vardapet, Ghazar Parpetsi, and Sebeos) Apar seemingly indicated "a geographical area (Khorasan), which might also intimate a political formation once there"; additionally, "'Apar-shar', that is, the country of the Apar" was named after possibly Hephthalites, who were known as 滑 MC *ɦˠuɛt̚ > Ch.Huá in Chinese sources. Even so, *Apar could not be linked to the European Avars, notwithstanding any link, if there were, between the Hephthalites and Rourans. Furthermore, Dobrovits has questioned the authenticity of Theophylact's account. As such, he has argued that Theophylact borrowed information from Menander's accounts of Byzantine–Turk negotiations to meet political needs of his time–i.e. to castigate and deride the Avars during a time of strained political relations between the Byzantines and Avars (coinciding with Emperor Maurice's northern Balkan campaigns).
Paul the Deacon in his History of the Lombards insisted that Avars were known previously as Huns and he conflated the two groups.
Uar, Rouran and other Central Asian peoples
According to some scholars, the Avars who settled in Pannonia originated from a confederation, formed in the Aral Sea region, by a tribe known as the Uar (also known as the Ouar, Warr and Var) and the Xionites (or Chionitae, Xiyon etc). The Pannonian Avars were also known by names including Uarkhon and Varchonites – which may have been a portmanteau combining names such as Var and Chion. The cultural and linguistic affiliations of the Uar have remained obscure, although the Xionites had likely been speakers of Iranian and/or Turkic languages. (While the Hephthalites had also previously been part of the same confederation as the Uar and Xionites, the Hephthalites had evidently not taken part in any westward migration, and had instead remained in Central Asia, and migrated into South Asia.)