Duke of Teck is a title which was created twice in Germanic lands. It was first borne from 1187 to 1439 by the head of a cadet line of the German ducal House of Zähringen, known as the "first House of Teck". The seat of this territory was Castle Teck in the Duchy of Swabia.
Coat of arms of the Dukes of Teck, Scheiblersches Wappenbuch, 1450–80
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. 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.
Photograph by Alexander Bassano circa 1888
Francis, Duke of Teck, and Mary Adelaide, Duchess of Teck, with Duke Philipp and Duchess Marie Therese of Württemberg in England, around 1866