King of Gandarike ( Kievan Rus'). Married Aud the Deepminded without the consent of her father Ivar Vidfame. Ivar set out to punish them but died on the way, leaving Ráðbarðr free to help Aud's son, Harald Wartooth claim his inheritance in Sweden and Norway. Ráðbarðr and Aud had a son, Randver. [1]
Sources
↑ Wikipedia: Ráðbarðr
Sögubrot af Nokkrum Fornkonungun í Dana ok Svíaveldi
Abt 0638 - 0690 (52 years)