The following list includes all of the official names of New Prussia in their respective languages. Any of these names can be used within the sovereign state. English - Grand Duchy of New Prussia German - Großherzogtum New Preußen Danish - Storhertugdømmet Ny Preussen Swedish - Storhertigdömet Nya Preussen Norwegian - Storhertugdømmet Nye Preussen French - Grand-Duché de Prusse Nouveau