Born Ferdinand August Franz Anton in Vienna, he was the eldest son of Prince Ferdinand of Saxe-Coburg-Saalfeld and his wife Princess Maria Antonia Koháry, heiress to the House of Koháry. The younger Ferdinand grew up in several places: the family estates in modern-day Slovakia , the imperial court of Austria, and Germany.
Prince Valdemar of Denmark (27 October 1858 – 14 January 1939) was a member of the Danish royal family. He was the third son and youngest child of Christian IX of Denmark and Louise of Hesse-Kassel. He had a lifelong naval career. He was paternal uncle of Prince Andrew of Greece and Denmark, father of Prince Philip, Duke of Edinburgh