Louis the German, also known as Louis II, was the first king of East Francia, and ruled from 843–876 AD. Grandson of emperor Charlemagne and the third son of Louis the Pious, emperor of Francia, and his first wife, Ermengarde of Hesbaye, he received the appellation Germanicus shortly after his death in recognition of Magna Germania of the Roman Empire, reflecting the Carolingians' assertions that they were the rightful descendants of the Roman Empire. Wikipedia