Oleg (Russian: Олег), Oleh (Ukrainian: Олег), or Aleh (Belarusian: Алег) is an East Slavic given name. The name is very common in Russia, Ukraine, and Belаrus. . Origins. Oleg derives from the Old Norse Helgi (Helge), meaning "holy", "sacred", or "blessed". The feminine equivalent is Olga. While Germanic in origin, "Oleg" is not very common outside Eastern European countries, while "Helge" and "Helga" are common names in Scandinavia. Russian pronunciation. Олег (Oleg) is pronounced [ɐˈlʲek] in Russian.
https://en.wikipedia.org/wiki/Oleg