Yarmaq was name for Khazar Khaganate currency. The term for silver coin was sheleg (it might have direct connection to the term shekel. The currency was mentioned in the Tale of Bygone Years as tribute money for Vyatichi and other Khazar subjects Old East Slavic: щеляг, romanized: schelyag. Shelegs were probably minted in Kabir (Moxel, client state of Khazar Kaghanate) since approximately 5th c AD.[1] The term for the gold coin might be oka, as they were minted in the same place and called oka (Moksha: ока, romanized: oka, lit. 'gold')[2]