Hermann II of Hesse (1341 – 24 May 1413) was Landgrave of Hesse from 1376 to 1413. Hermann II, called "the Scholar", was born in 1345 in Burg Grebenstein (de) (Grebenstein castle), the son of Louis the Junker. Louis the Junker was a son of Otto I, Landgrave of Hesse. Hermann studied in Paris and in Prague. After the death of , the son and heir apparent of Henry II, the latter appointed his nephew Hermann as co-ruler and heir in 1367.