The Hervarar saga tells the tale of a Valdar who was viceroy of Denmark under Ivar Vidfamne and he was the father of Randver and of Harald Wartooth (half siblings and fathers found were Hrörek av Lejre and Radbart - mother being Aud Djupaudga) who was a legendary king of Denmark and Sweden.
The Skjöldunga saga and Hversu Noregr byggdist tell the tale of a Valdar who succeeded Hrólfr Kraki as King of Scania.
The Hervarar saga tells that Ivar Vidfamne made Valdar the viceroy of Denmark and gave him his daughter Alfhild.
The Skjöldunga saga tells that a Valdar disputed that Rörek, the cousin of Helgi (Halga) succeeded Hrólfr Kraki (Hroðulf) as the king of the Daner.
If based on the same tradition as Hversu Noregr byggdist, Valdar had the right to claim the throne being the son of the former king Hróarr (Hroðgar).