Herman II, Count of Weimar-Orlamünde

Herman II (c. 1184–1247) was the son of Siegfried III and ruled Weimar-Orlamünde jointly with his brother Albert II after 1206. His feud with the Ludovingian landgraves of Thuringia went badly: Landgrave Herman I captured him at Weimar Castle in 1214, and Louis IV later took up arms against the brothers.

He refounded Weimar as a town and established the Cistercian nunnery at Oberweimar. He married Beatrix of Andechs-Merania, heiress of Plassenburg, and died on 27 December 1247.