Friedrich III, Duke of Holstein-Gottorp (1597-1659) - GAMEO
John Adolphus, Duke of Schleswig-Holstein-Sonderburg-Plön - Wikiwand
Holstein-Gottorp, Georg Ludwig Duke zu - Project Seven Years War
Portrait of Peter Karl Ulrich, Duke of Holstein-Gottorp, later Tzar Peter III by Georg Khristopher Groot on artnet
Charles Frederick of Holstein-Gottorp - Charles Frederick, Duke of Holstein-Gottorp - Wikipedia | Екатерина великая, Россия, Мужской костюм
Duke | Holstein International
Adolf, Duke of Holstein-Gottorp - Person - National Portrait Gallery
Adolf, Duke of Holstein-Gottorp - Wikipedia
94 Duke Of Holstein Photos and Premium High Res Pictures - Getty Images
Frederick III, Duke of Holstein-Gottorp - Wikipedia
Karl Friedrich, Duke of Holstein-Gottorp Stock Photo - Alamy
Frederick IV, Duke of Holstein-Gottorp - Wikipedia
Adolf, Duke of Holstein-Gottorp - Wikipedia
Charles Frederick, 30.4.1700 - 18.6.1739, Duke of Holstein-Gottorp, full length, with his great-grandmother, Queen Hedvig Eleonora of Sweden, painting by David von Krafft, 1705 Stock Photo - Alamy
European Heraldry :: Holstein-Gottorp
Frederick Louis, Duke of Schleswig-Holstein-Sonderburg-Beck - Wikipedia
Karl Friedrich, Duke of Holstein-Gottorp Stock Photo - Alamy
File:David Richter d.y. - Karl Fredrik, Duke of Holstein-Gottorp - NMB 2137 - Nationalmuseum.jpg - Wikimedia Commons
Carl Frederick of Schleswig-Holstein-Gottorp (1700-1739) - Find a Grave Memorial
File:David Richter d.y. - Charles Frederick, Duke of Holstein-Gottorp - NMB 2138 - Nationalmuseum.jpg - Wikimedia Commons
Frederick III, Duke of Holstein-Gottorp - Wikiwand
Charles Frederick, Duke of Holstein-Gottorp - Wikipedia
Karl Friedrich Charles Frederick, Duke of Holstein-Gottorp and Price of Sweden, historic engraving of 1899, Kiel, Schleswig-Holstein, North Germany Stock Photo - Alamy
Charles Frederick, Duke of Holstein-Gottorp - Wikipedia
37 Duke Of Holstein Gottorp Photos and Premium High Res Pictures - Getty Images
Duke of schleswig holstein hi-res stock photography and images - Alamy
/Sire/VirDir/250HO13267s_01_201811_S-S-I%20Montross%20Duke-ET.jpg "DUKE ( 250HO13267 ) : S-S-I MONTROSS DUKE-ET - Bull | World Wide Sires, Ltd.")