Johann I may refer to: Johann I Josef, Prince of Liechtenstein (1760–1836) Johann I, Duke of Opava-Ratibor Johann I, Count Palatine of Simmern Johann I, Count Palatine of Zweibrücken John, Elector of Saxony (1468–1532), John the Steadfast Johann, Count of Cleves Johann, Count of Coronini-Cronberg Johann, Count of Pálffy Johann, Count von Aldringer Johann, Count von Werth Johann, Elector of Brandenburg Johann Strauss I Johann, Baron von Appel Johann I, Count of Habsburg-Laufenburg-Rapperswil (* around 1295/97, † 1337) See also John I (disambiguation)