Prince Henry of Prussia (German: Albert Wilhelm Heinrich; 14 August 1862 – 20 April 1929) was a younger brother of German Emperor William II and a Prince of Prussia. He was also a grandson of Queen Victoria. A career naval officer, he held various commands in the Imperial German Navy and eventually rose to the rank of Grand Admiral and Generalinspekteur der Marine. On 24 May 1888, Henry married Princess Irene of Hesse and by Rhine, his first cousin. His dying father, German Emperor Frederick III and his mother Empress Victoria were in attendance. The marriage produced three children:
Prince Waldemar
Prince Sigismund
Prince Henry