Etel-Köz was central Carpathia, the Szekely land of the Ugrian Közari which was ruled by the Bulanids Jews.

Etel-Köz was established by the Akötziri "Huns" who remained in the Carpathians after Etel's son Csaba the Hun left for the Wild Fields in the 5th century.

Etel-Köz fell under the rule of Edemen's Avar-Bulgars in the 6th century only to be crushed by the Utigurs of his brother Ed from the Wild Fields. Hence it was ruled by Kubrat's Kubiars in the 7th century before the Kubiar Civil War of 677 when Ed's Hungarians fled to the Dniestr (some, allegedly, even as far as the Volga) and Etel-Köz gained independence.

In the 8th century Etel-Köz's Kahan Bulan was converted to Judaism by Yitzhak Sangari . Under the Bulanids, the Székely Közari of Etel-Köz expanded westward forcing Edemen's Kubiars into Croatia and leaving Közar graves in Chelarevo and other Közar traces in Crisana such as Satmar.

Etel-Köz entered into a friendly alliance with the Hungarian Cowari of the Dniestr in the 9th century to liberate those Székely Közari in the west who had fallen under the rule of the Mojmirids. After helping the Hungarians settle in Pannonia, only a tiny remnant of Ugrians known as the Csangos remained behind in Moldavia where they were eventually converted to Catholicism by the Cuman Diocese.

Etel-Köz only survived as an independent Judaic kingdom in alliance with Hungary until the 11th century but continued to be the main base for Székely Sabbatarians until the Shoah. Its last stronghold was flooded by Ceaușescu in 1989.