Presumably the same title is rendered as "German Imperial Commissioner" in the case of Heligoland, a strategically located once-Danish island in the North Sea, formally handed over to Germany by the UK on 9 August 1890 (under the Heligoland–Zanzibar Treaty) and on 15 December 1890 formally annexed to Germany (after 18 February 1891 part of the Prussian province of Schleswig-Holstein): 9 August 1890 – 1891 Adolf Wermuth (b. 1855 – d. 1927)