Crown Arun was a 2,372 GRT cargo ship which was built by Actien-Gesellschaft „Neptun“ Schiffswerft und Maschinenfabrik, Rostock as Hannah Böge. She was captured at sea on 3 September 1939 and declared a war prize. Taken into service by the British Government, Crown Arun was torpedoed and sunk by on 17 September 1940.