Assertion: nobility's title | /r/HasProperty | duke of sønderborg
Facets:
Source sentences:
text: Denmark's kings gave appanages in their twin-duchies of Schleswig-Holstein (now three-quarters of them are part of Germany, but then the Holstein half of it was part of the Holy Roman Empire in personal union with Denmark proper) to younger sons or their male-line descendants, with a specific though not sovereign title of Duke, e.g., Duke of Gottorp, Duke of Sønderborg, Duke of Augustenborg, Duke of Franzhagen, Duke of Beck, Duke of Glücksburg and Duke of Nordborg.