Carloman of Bavaria was the eldest grandson of what descendant of Charlemagne?
Carloman of Bavaria Carloman (German: "Karlmann" , Latin: "Karlomannus" ; c. 830 – 22 March 880), was a Frankish king of the Carolingian dynasty. He was the eldest son of Louis the German, king of East Francia, and Hemma, daughter of a Bavarian count. His father appointed him margrave of Pannonia in 856, and upon his father's death in 876 he became King of Bavaria. He was appointed by King Louis II of Italy as his successor, but the Kingdom of Italy was taken by his uncle Charles the Bald in 875. Carloman only conquered it in 877. In 879 he was incapacitated, perhaps by a stroke, and abdicated Bavaria to Louis the Younger and Italy to Charles the Fat.
Widonids The Widonids, Guidonids or Vitone were an Italian family of Frankish origin prominent in the ninth century. They were descended from Guy of Nantes, whose origins were Austrasian. They were an aggressive dynasty, expanding their base of power into the Papal States, ever loyal to the Empire and never the Papacy. They were related to the Carolingians in the female line and one even made a claim to the throne of France on that basis. The Widonids and the Rogonids competed for control of the Breton March through much of the ninth century.