What is "rugila"

Rugila or Ruga (also Ruas; died second half of the 430s AD), was a ruler who was a major factor in the Huns early victories over the Roman Empire. He served as an important forerunner with brother Octar, with whom initially ruled in dual kingship, possibly a geographical division where Rugila ruled over Eastern Huns while Octar over Western Huns, during the 5th century AD.