His eldest daughter, Alexandra, married the future English king Edward VII; another daughter, Dagmar, under the name of Maria Fjodorovna, wed the future Tsar Alexander III, while his youngest daughter, Thyra, married Duke Ernst August of Cumberland, the pretender to the throne of Hanover who lived in Austrian exile. In May 1863 his son, Wilhelm, under the name of Georg I, was proclaimed “King of the Hellenes” by the Greek National Assembly. And, in 1905, his grandson, Carl, was elected King Haakon VII of Norway. Through Christian IX, Glücksburg became the ancestral home of the Danish, Norwegian and Greek Royal Houses. Christoph Prince of Schleswig-Holstein is a cousin of the Queen of Denmark.
Only the descendants of Queen Victoria can compete with the House of Schleswig-Holstein-Sonderburg-Glücksburg on the European “marriage market” of the higher nobility. The descendants of Christian IX can be found in the royal families of the following countries: Belgium, England, France, Greece, on the Balkans, Luxemburg, Monaco, Norway, Rumania, Russia, Spain, Sweden, Germany and Austria.
The ancestral Glücksburg castle provided the central point for a documentary, “King Christian IX and his European descendants”, produced by Danish television. The series, which was shown in several parts, was very successful in Denmark and has been broadcast in more than 100 countries. It was accompanied by a coffee-table book, which has been issued in several editions.