About Francis, Duke of Teck
Francis, Duke of Teck, known as Count Francis von Hohenstein until 1863, was an Austrian-born nobleman who married into the British royal family. His wife, Princess Mary Adelaide of Cambridge, was a first cousin of Queen Victoria. He was the father of Queen Mary, the consort of King George V, and thus maternal grandfather of both Edward VIII and George VI. Francis held the Austrian title of Count of Hohenstein, and the German titles of Prince (Fürst) and later Duke of Teck, and was given the style of Serene Highness in 1863. He was granted the British style of Highness in 1887. In 1863, Francis was created Prince of Teck, with the style of Serene Highness, in the Kingdom of Württemberg. His title at birth was Count Francis von Hohenstein, after his mother was created Countess von Hohenstein in her own right by Emperor Ferdinand I of Austria. He served as Orderly Officer under Count von Wimpffen in Italy during the Austro-Sardinian War and was awarded the gold medal for distinguished service at the Battle of Solferino and the bronze war medal, 1859.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.