The title was first conferred on Thomas of Woodstock, the thirteenth child of King Edward III.

The fifth and most recent creation was for Prince Henry, third son of King George V, styled as His Royal Highness The Duke of Gloucester.

The heir-apparent to the title is Alexander Windsor, styled Earl of Ulster.

The next in the line of succession is the Earl of Ulster's son Xan Windsor, known by his grandfather's third title of Lord Culloden.

Also: Earl of Ulster and Baron Culloden (1928)[1] Includes dukes of: Albany, Albemarle, Bedford, Cambridge, Clarence, Connaught and Strathearn, Cumberland, Edinburgh, Gloucester, Gloucester and Edinburgh, Hereford, Kent, Kintyre and Lorne, Norfolk, Ross, Somerset, Sussex, Windsor, and York, but only when royally.