Duke of Teck
Frederick was born on 24 September 1907 in Vienna, Austria, where his father was the British military attaché. At the time of his birth, his father was styled Prince Adolphus, Duke of Teck, the eldest son of Francis, Duke of Teck and Princess Mary Adelaide of Cambridge (a granddaughter of King George III). His mother was The Duchess of Teck (née Lady Margaret Evelyn Grosvenor), daughter of 3rd Marquess of Westminster (later 1st Duke of Westminster).