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

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