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. 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.

Princess Mary Adelaide of Cambridge, later known as the Duchess of Teck, was a member of the British royal family. She was one of the first royals to patronise a wide range of charities and was a first cousin of Queen Victoria.