When was the father of Princess Juliane Sophie of Denmark born ?
Frederick, Hereditary Prince of Denmark Frederick, Hereditary Prince of Denmark (Danish: "Frederik" ; 11 October 1753 – 7 December 1805) was heir presumptive to the thrones of Denmark and Norway. He was the surviving son of King Frederick V by his second wife, Juliana Maria of Braunschweig-Wolfenbüttel.
Princess Sophie of Saxe-Coburg-Saalfeld Princess Sophie of Saxe-Coburg-Saalfeld (Sophie Fredericka Caroline Louise; 19 August 1778 – 9 July 1835) was a princess of Saxe-Coburg-Saalfeld, and the sister of Princess Victoria of Saxe-Coburg-Saalfeld and King Leopold I of Belgium, and aunt of Queen Victoria. By marriage, she was a Countess of Mensdorff-Pouilly.