Ernest of Brunswick-Lüneburg may refer to:
Ernest I, Duke of Brunswick-Lüneburg (1497–1546), also called Ernest the Confessor Ernest II, Duke of Brunswick-Lüneburg (1564–1611) Ernest I, Duke of Brunswick-Grubenhagen (c. 1297–1361) Ernest II, Duke of Brunswick-Grubenhagen (1418–1466) Ernest III, Duke of Brunswick-Grubenhagen (1518–1567) Ernest I, Duke of Brunswick-Göttingen (c. 1305–1367) Ernest Ferdinand, Duke of Brunswick-Lüneburg (1682–1746) Ernest Augustus, Elector of Brunswick-Lüneburg (1629–1698) Ernest Augustus, Duke of Brunswick (1887–1953) Duke Louis Ernest of Brunswick-Lüneburg (1718–1788)