Carloman of Bavaria was the eldest grandson of what descendant of Charlemagne?
Louis the German Louis (also Ludwig or Lewis) "the German" (c. 802-876), also known as Louis II, was the first king of East Francia. Grandson of emperor Charlemagne and the third son of emperor of Francia, Louis the Pious and his first wife, Ermengarde of Hesbaye, he received the appellation "Germanicus" shortly after his death in recognition of the fact that the bulk of his kingdom was in the former Germania.
Ferdinand of Bavaria (bishop) Ferdinand of Bavaria (German: "Ferdinand von Bayern" ) (6 October 1577 – 13 September 1650) was Prince-elector archbishop of the Archbishopric of Cologne (Holy Roman Empire) from 1612 to 1650, as successor of Ernest of Bavaria. He was also prince-bishop of Hildesheim, Liège, Münster, and Paderborn.