With a history of use extending back to Vedic texts of the second millennium BC, derivations of the name Mithra appear in the Roman Empire, across Sasanian Persia, and in the Kushan Empire of southern Afghanistan and northern India during the first millennium AD. Even today, this name has a place in Yazidi and Zoroastrian religion. But what connection have Mihr in Persia, Miiro in Kushan Bactria, and Mithras in the Roman Empire to one another?