Samo

…personalities as the Frankish merchant Samo, who gained control of a large territory in which at least part of Bohemia was included. His death in 658 ended the loosely knit state. A more auspicious era dawned after the Frankish king Charlemagne defeated the Avars in the 8th century.

…a Slavic kingdom emerged under Samo (reigned 623–658) that extended from the Sava valley northward as far as Leipzig. It came under Frankish rule in 748. Over the next two centuries, Alpine Slavs living in present-day Austria and western Hungary were absorbed by waves of Bavarian and Magyar invaders, so…