From when was the father of Ernst Gunther pretender to the throne of Schleswig-Holstein?
Ernst Gunther, Duke of Schleswig-Holstein: Ernst Gunther, Duke of Schleswig-Holstein (August 11, 1863 – February 22, 1921) was a son of Frederick VIII, Duke of Schleswig-Holstein and Princess Adelheid of Hohenlohe-Langenburg.
i don't know