A charter issued in 860 by King Louis the German for the Mattsee Abbey may well attest that the Onogurs (another people of Turkic origin) were also present in the territory. The charter refers to the "Marches of the Wangars" (marcha uuangariourum) situated in the westernmost regions of the Carpathian Basin. The Wangar denomination seems to reflect the Slavic form of the Onogurs' ethnonym.
