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It is also known as the House of Ivar Vidfamne, the House of Uppsala, or simply the Old Dynasty. Munsö is the island where a barrow has been claimed to be the grave of Björn Ironside, a legendary founding member.
The sagas, such as the Hervarar saga, contain extensive information on this dynasty for as many as 10 generations, but although, some of the 9th-century kings are held to be historical, modern Swedish historiography begins it with the late 10th-century king, Eric the Victorious. The king Björn, who was the father of Eric the Victorious, according to the sagas, is not accepted as historical by critical historians, unlike another 10th-century king named Emund Eriksson who appears in the work of Adam of Bremen.