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Semargl or Simargl (Old Church Slavonic: Семарьглъ, Симарьглъ) is a deity or mythical creature in East Slavic mythology. An idol of Semargl was present in the pantheon of Great Prince Vladimir I of Kiev. It may be the equivalent of Simurgh in Persian mythology who is also represented like a griffin with a dog body. But according to Vyacheslav Vsevolodovich Ivanov and Vladimir Toporov, the name comes from the Slavonic *Sedmor(o)-golvъ ("with seven heads").
See also 
- Simurgh, a related being in Iranian mythology