What is "ragnaris"

Ragnaris (Greek spelling died 555) was a Hunnic warlord who fought for the Ostrogoths in the final stages of the Gothic War against the Eastern Roman Empire. Procopius calls him a Goth, but the better informed Agathias records that he was of the Hunnic tribe of the Vittores or Vitgores (possibly the Bittugures mentioned in Jordanes).