Duke of 's Koningenwaarde

Duke of 's Koningenwaarde (Duchess of 's Koningenwaarde if held by a woman; also known as Duke or Duchess of Kingsworth; in Batavian: Hertog van 's Koningenwaarde or, if female, Hertogin van 's Koningenwaarde) is a title of nobility in the Imperial Peerage of Shireroth, created for and currently held by His Illustriousness Frederik Alfons des Vinandy, King of Batavia, through the Treaty of Raynor's Keep. 

The title is unique in Shirerithian imperial peerage, as the rules for succession to this title are to be made by the Hogerhuis of Batavia, with the assent of the Kaiseress, as long as the successor is a descendant of the first holder.

The seat of the duchy is at Château Paravel, off the coast of the city of 's Koningenwaarde. The duchy holds most of the former Archduchy of 's Koningenwaarde, excluding the grounds of certain properties, such as Blanckenhof Palace. It is possible that, in the future, all of Batavia will be extended to be included in the Duchy of 's Koningenwaarde, save for the territories under the Duke of Gascony.