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.
Adalrich, Duke of Alsace Adalrich (Latin: "Adalricus" ; reconstructed Frankish: "*Adalrik"; died after 683 AD), also known as Eticho, was the Duke of Alsace, the founder of the family of the Etichonids and of the Habsburg, and an important and influential figure in the power politic of late seventh-century Austrasia.