Charles Frederick, Duke of Holstein-Gottorp
Prince Albert, Duke of Schleswig-Holstein | Unofficial Royalty
Joachim Frederick, Duke of Schleswig-Holstein-Sonderburg-Plön - Wikiwand
Frederick IV von Schleswig-Holstein-Gottorp (Holstein-Gottorp, Oldenburg), Herzog (1671 - 1702) - Genealogy
File:David Richter d.y. - Charles Frederick, Duke of Holstein-Gottorp - NMB 2138 - Nationalmuseum.jpg - Wikimedia Commons
His Majesty the King of Denmarks letter to His Highness the Duke of Holstein (Gottorp) concerning the sequestration of the Dukedom of Schleswig and ... letter to the Duke of Holstein (1677):
Ernest Günther, Duke of Schleswig-Holstein-Sonderburg-Augustenburg - Wikidata
Adolf, Duke of Holstein-Gottorp - Wikipedia
Unknown Person - Charles, Duke of Schleswig-Holstein-Sonderburg-Glücksburg (1813-1878)
Duke of Holstein-Gottorp - Wikipedia
1700 Karl Friedrich - Charles Frederick, Duke of Holstein-Gottorp - Wikipedia | Charles, Karl, Duke
File:David von Krafft - Duke of Holstein-Gottorp, Karl Fredrik as a child - S 54 - Finnish National Gallery.jpg - Wikimedia Commons
File:Frederick IV (1671-1702), Duke of Holstein-Gottorp, and his spouse Hedvig Sophia (1681–1708).jpg - Wikimedia Commons
Category:Johann Adolf, Duke of Schleswig-Holstein-Sonderburg-Plön - Wikimedia Commons
Adolf, Duke of Holstein-Gottorp - Wikipedia
Portrait of Peter Karl Ulrich, Duke of Holstein-Gottorp, later Tzar Peter III by Georg Khristopher Groot on artnet
About Frederick III: Duke of Holstein-Gottorp (1597 - 1659) | Biography, Bibliography, Facts, Career, Life
Adolf, Duke of Holstein Gottorp - Alchetron, the free social encyclopedia
Charles Frederick, 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
Portrait of Duke Charles Frederick of Holstein-Gottorp (1700-1739). Museum: State Museum of Architecture, History and Art, Vladimir. Author: ANONYMOUS Stock Photo - Alamy
John Adolf, Duke of Holstein-Gottorp - Wikipedia
Albert, Duke of Schleswig-Holstein - Wikidata
Karl Friedrich, Duke of Holstein-Gottorp Stock Photo - Alamy
