Hardrad - Can any one shed light on parents

They seem to be recently added this year -

Richbald Argengau, van de
Gender: Male
Birth: 690
Death: 750 (60)
Immediate Family:
Son of Agilulf Vinzgau, van de
Husband of Ermengarde
Father of Hardrad
Added by: Wilhelmina Giltjes on May 7, 2016
Managed by: Wilhelmina Giltjes

See @https://www.geni.com/discussions/160235

this branch contains many profiles that are doubles of MP'd and locked; it also contains a lot of superlative profiles