Who married Prince Henry of Prussia (1862–1929)?

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.

Princess Irene of Hesse and by Rhine (Irene Luise Marie Anne; 11 July 1866 – 11 November 1953), later Princess Henry of Prussia, was the third child and third daughter of Princess Alice of the United Kingdom and Louis IV, Grand Duke of Hesse and by Rhine. Her maternal grandparents were Queen Victoria and Prince Albert of Saxe-Coburg and Gotha. Her paternal grandparents were Prince Charles of Hesse and by Rhine and Princess Elisabeth of Prussia. She was the wife of Prince Henry of Prussia, a younger brother of Wilhelm II, German Emperor and her first cousin. The SS Prinzessin Irene, a liner of the North German Lloyd was named after her.

Her siblings included Princess Victoria of Hesse and by Rhine, wife of Prince Louis of Battenberg, Grand Duchess Elizabeth Feodorovna of Russia, wife of Grand Duke Sergei Alexandrovich of Russia, Ernest Louis, Grand Duke of Hesse and by Rhine, and Empress Alexandra Feodorovna of Russia, wife of Tsar Nicholas II of Russia. Like her younger sister, the empress, Irene was a carrier of the hemophilia gene, and Irene would lose her sisters Alix and Elisabeth in Russia to the Bolsheviks.