There are a number of synonyms that can be used to refer to Louis the German, who was a ruler of the Frankish empire in the 9th century. Some of these include Ludwig der Deutsche (in German), Louis le Germanique (in French), and Lodewijk de Duitse (in Dutch). Other terms that might be used to describe him could include Louis II or Louis III, depending on how one is counting the various rulers who have borne that name over the centuries. Ultimately, though, the most familiar form of his name is likely to be the one he is best known by in English-speaking countries: Louis the German.