I am currently reading 'The Legend Of Sigmar' which made me look up a few things about the Jutones. It appears that according to this wiki Marius founded Marienburg which seems odd because that would be right in the middle of Endal territory and right next to Marburg, the capital of the Endals. Also the elven ruins his capital is supposed to be built on fit the description of those of Marburg and Marius lives in Jutonsryk in the Wasteland at the time of him joining the Empire of Sigmar. So might we be wrong about the origins and it is really Marburg which becomes Marienburg?