 Historians such as Andrew Merrill have pointed out that the similar elements in the accounts of Jordanes and Procopius may come from a common source, such as Cassiodorus, who worked for Theoderic.Apart from the name Rudolf, the association with the region of the Dani, their apparent allegiance to Theoderic is notable.Another possible record of Rodulf is thus one of the surviving state papers of Theoderic shows that he adopted a Herule king (who is not named in that passage) as a "son in arms".