John II, Duke of Schleswig-Holstein-Haderslev (died 1580)

John the Elder, Duke of Schleswig-Holstein-Haderslev

Duke of Schleswig-Holstein-Haderslev

John the Elder was the only Duke of Schleswig-Holstein-Haderslev. The predicate the Elder is sometimes used to distinguish him from his nephew, John the Younger, who held Sønderborg from 1564 as a partitioned-off duke. As a co-ruler in the duchies of Holstein and of Schleswig,…