Wikipedia
Tamga
A tamga or tamgha "stamp, seal" (, Turkic: tamga) is an abstract seal or stamp used by Eurasian nomadic peoples and by cultures influenced by them. The tamga was normally the emblem of a particular tribe, clan or family. They were common among the Eurasian nomads throughout Classical Antiquity and the Middle Ages (including Alans, Mongols, Sarmatians, Scythians and Turkic peoples).
Similar "tamga-like" symbols were sometimes adopted by sedentary peoples adjacent to the Pontic-Caspian steppe both in Eastern Europe and Central Asia. Archaeologists prize tamgas as a first-rate source for the study of present and extinct cultures.
Tamga (genus)
Tamga hamulifera is a disk-shaped fossil from Precambrian strata of the White Sea area, in Russia.