Etel-Köz was the Szekely land of the Ugrian Közar which was ruled by the Bulanids.

Etel-Köz was established by the Akötzir "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 Ed's Hungarians fled to the Dniestr (some, allegedly, even as far as the Volga) in the Kubiar civil war 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 Közar of Etel-Köz expanded westward 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 Közar 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 kingdom in alliance with Hungary until the 11th century but continued to be the main base for Székely Sabbatarians until it was flooded by Ceaușescu in 1989.