The following is a list of jarls and dukes, who ruled over Schleswig respectively Southern Jutland (Sønderjylland).
Second rule not as Duke, but as King ruling over Schleswig. "Albrectsen 2008 p. 52" "Albrectsen 2008 p. 52" Christopher I of Denmark recognised him...
Friedrich Ferdinand, Duke of Schleswig-Holstein (1855–1934) Wilhelm Friedrich, Duke of Schleswig-Holstein (1891–1965) Peter, Duke of Schleswig-Holstein (1922–1980)...
underage Frederick was elected co-Duke of Schleswig and Holstein in 1482, the other co-duke being his elder brother, King John of Denmark. In 1490 at Frederick's...