Prince Philip, Duke of Edinburgh the Naval Staff College, Greenwich. From 1949, he was stationed in Malta (residing at Villa Guardamangia) after being posted as the first lieutenant of the destroyer HMS "Chequers", the lead ship of the 1st Destroyer Flotilla in the Mediterranean Fleet. On 16 July 1950, he was promoted to lieutenant commander and given command of the frigate HMS "Magpie". On 30 June 1952, Philip was promoted to commander, though his active naval career had ended in July 1951. With the King in ill health, Princess Elizabeth and the Duke of Edinburgh were both appointed to the Privy Council on 4 November
Prince Christoph of Hesse the sister of the future Prince Philip, Duke of Edinburgh. They had five children: Prince Christoph of Hesse Christoph Ernst August of Hesse (Frankfurt, 14 May 1901 – Apennine Mountains near Forlì, 7 October 1943) was the fifth son of Prince Frederick Charles of Hesse and Princess Margaret of Prussia. He was a German SS officer killed in a plane crash during World War II. He was a brother-in-law of Prince Philip, the consort of Queen Elizabeth II. Born in Frankfurt, Prince Christoph was a great-grandson of Queen Victoria and Prince Albert of Saxe-Coburg and Gotha through their eldest daughter