Pepin of Herstal
While his predecessor, Aldgisl, had welcomed Christianity into his realm, Redbad attempted to extirpate the religion and free the Frisians from subjugation to the Merovingian kingdom of the Franks. In 689, however, Redbad was defeated by Pepin of Herstal in the battle of Dorestad and compelled to cede Frisia Citerior (Nearer Frisia, from the Scheldt to the Vlie) to the Franks.