 Interpretation of this is not certain but it is also indicative of a mixed Gaelic/Norse population.There is no evidence of permanent Viking settlement on the east coast south of the Moray Firth, or of Norse burials, although raids and even invasions certainly occurred.Dunnottar was taken during the reign of Domnall mac Causantín and the "Orkneyinga saga" records an attack on the Isle of May, by Sweyn Asleifsson and Margad Grimsson