Khazar coinage

Yarmaq was name for Khazar Khaganate currency. The term for silver coin was sheleg since approximately 5th c AD. The term for the gold coin might be oka, as they were minted in the same place and called oka

Etymology

The term meant since at least early Middle Ages, no other meanings had been attested.

Other versions

Ar- or yar- evolved from the verb "to cut longitudinally, to split", Turkish verb is also co-originating with the Old Turkic word ır- or yır- which means the same. The name is similar to Mongolian language word "yaarmag" meaning "market," especially outdoor ones that sell wide variety of goods.

Resources

Roman K. Kovalev. "What Does Historical Numismatics Suggest About the Monetary History of Khazaria in the Ninth Century? – Question Revisited." Archivum Eurasiae Medii Aevi 13 : 97–129.
Roman K. Kovalev. "Creating Khazar Identity through Coins: The Special Issue Dirhams of 837/8." East Central and Eastern Europe in the Early Middle Ages, ed. Florin Curta, pp. 220–253. Ann Arbor, MI: University of Michigan Press, 2005.