Count Gustaf David Gilbert John William Hamilton (20 March 1869–11 August 1947) was a highly decorated Swedish soldier and noble who served in the Imperial German Army during World War I and served as commander of the 3rd (East Prussian) Cuirassiers "Count Wrangel.".

Between the years 1915–18 he commanded the 22nd reserve jaeger battalion, which, at the time, was stationed between Belarus and Ukraine, directly north of the city of Pinsk.

He did this as Commander of the Squadron "Hamilton" under the Brandenstein brigade as part of the German Expeditionary Corps, Die Ostseedivision.

Besides his military career he served as an adjutant to the exiled Kaiser Wilhelm II in Doorn for several weeks each year.

[3][4] On the 25th year anniversary of the German Victory at Tannenberg, during a ceremony on the 25 August 1939, Adolf Hitler personally appointed him as an honorary General of the Wehrmacht, with the rank of Generalmajor in the Reserve.