Gerlach IIGerlach II may refer to: Gerlach II of Isenburg-Covern, Count of Isenburg-Covern 1158–1217 Gerlach II of Isenburg-Arnfels, Count of Isenburg-Arnfels 1333–1379 Gerlach II, Count of Nassau-Wiesbaden, ruled 1370–1386