Kruto (or Cruto) (died 1093), son of Grin or Grinus, was a prince of Wagria. James Westfall Thompson believed his family belonged to the Rani of Rugia. Gottschalk, a Christian Obodrite prince who was married to the daughter of his Danish ally Sven Estridson, had subdued the Obodrite and some Lutician tribes in the 1050s. In 1066, Kruto succeeded in an uprising initiated by the Obodrite nobility and supported by the Luticians, against Gottschalk and his Saxon dukes Ordulf and Magnus. Gottschalk was slain, and his sons Budivoj and Henry exiled to Saxony and Denmark. Kruto made his capital out of a large palisaded fortress at Buku, an island in the confluence of the Trave and Wakenitz rivers and site of the later Lübeck.