Duke of Teck
Princess Helena was born at Grosvenor House, Mayfair, Westminster. Her father was Prince Adolphus of Teck (later the 2nd Duke of Teck and after 1917 the 1st Marquess of Cambridge), the eldest son of Prince Francis, Duke of Teck and Princess Mary Adelaide of Cambridge. Her mother was Lady Margaret Grosvenor, the third daughter of the 1st Duke of Westminster. As a child of Prince Adolphus of Teck, she was styled "Her Serene Highness Princess Helena of Teck" at birth.