House of Munsö
The House of Munsö (Swedish: Munsöätten), also called the House of Björn Ironside (Swedish: Björn Järnsidas ätt), the House of Uppsala (Swedish: Uppsalaätten) or simply the Old dynasty (Swedish: Gamla kungaätten), is the earliest reliably attested royal dynasty of Sweden, ruling during the Viking Age. None of the names suggested for the dynasty are universally accepted and most are problematic; the name "House of Munsö" derives from a questionable and speculative theory that they would have ruled from the island of Munsö and the name "House of Björn Ironside" derives from the supposed founder of the dynasty, Björn Ironside, who is often seen as a legendary, rather than historical, figure.