Etymology: from the Persian Simurgh a raptor or eagle. According to Vyacheslav Vsevolodovich Ivanov and Vladimir Toporov, the name of Simargl comes from the Slavonic *Sedmor(o)-golvъ «with seven heads».
Attested to in the Primary Chronicle as one of Vladimir’s Pantheon. Simargl, a winged dog, is the guardian of seeds and new shoots. Clearly a borrowing of the Iranian creature known as the Simurgh.
From the 16th Century “Slovo Khristoliubtsa”“It is not proper for Christians to play demonic games: dancing, playing music, demonic songs, and sacrifices to the idols, or praying to fire and fairies and to Mokosh and Simiregl and Perun and to Rod and the Rozhanitsy and to all those who are like them.”