"Princess Friederike of Schleswig-Holstein-Sonderburg-Glücksburg (9 October 1811 – 10 July 1902) was a daughter of Friedrich Wilhelm, Duke of Schleswig-Holstein-Sonderburg-Glücksburg and Princess Louise Caroline of Hesse-Kassel ...
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and an elder sister of Christian IX of Denmark.[citation needed] Friederike became the Duchess of Anhalt-Bernburg upon her marriage to Alexander Karl, Duke of Anhalt-Bernburg, the last Duke of Anhalt-Bernburg. She served as Regent of the Duchy from 1855 to 1863." - (en.wikipedia.org 03.05.2024)
