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.
Charles Theodore, Elector of Bavaria Charles Theodore (German: "Karl Theodor" ; 11 December 1724 – 16 February 1799) reigned as Prince-elector and Count Palatine from 1742, as Duke of Jülich and Berg from 1742 and also as prince-elector and Duke of Bavaria from 1777 to his death. He was a member of the House of Palatinate-Sulzbach, a branch of the House of Wittelsbach.