Prince Christoph of Schleswig-Holstein

Christoph of Schleswig-Holstein was the head of the House of Schleswig-Holstein-Sonderburg-Glücksburg and, by agnatic primogeniture, of the entire House of Oldenburg between 1980 and 2023. Traditionally he would have been the eighth Duke of Schleswig-Holstein and Duke of Glücksburg, styled as His Highness. He was a male-line descendant of Christian I of Denmark, and was also descended cognatically from numerous more recent monarchs, including Queen Victoria of the United Kingdom, Emperor Alexander II of Russia and several more recent Danish kings. His paternal grandmother was Princess Marie Melita of Hohenlohe-Langenburg, a great-granddaughter of Queen Victoria.