Rollo (Norman: Rou; Auld Norse: Hrólfr; French: Rollon; c. 846 – c. 930 AD) wis a Viking wha became the first ruler o Normandy, a region o Fraunce. He is sometimes cried the 1st Duke o Normandy. Rollo emergit as the ootstaundin personality amang the Norsemen wha haed secured a permanent fuithauld on Frankish soil in the valley o the lawer Seine. Charles the Simple, the keeng o Wast Francia, cedit thaim land atween the mooth o the Seine an wha is nou the ceety o Rouen in exchynge for Rollo greein tae en his brigandage, an provide the Franks wi protection against futur Viking raids.