In 867 there was a local revolt by the "Cokingi" and Rorik was driven out of Frisia. The Annales Bertiniani report that Lothair II "summoned up the host throughout his realm to the defense of the fatherland, as he explained, against the Norsemen, for he expected, that Hrørek, whom the local people, the new name for them is Cokings, had driven out of Frisia, would return bringing some Danes to help him." Coupland notes that the identity of the Cokingi is uncertain. Also uncertain is the nature of this loss of power by Rorik. Rorik could have lost control of only part of his realm or to have resumed control rather quickly. Because he is next mentioned in 870, still in Frisia.