Irene, Princess of Prussia

Princess Irene of Prussia, born Princess Irene of Hesse and by Rhine, (11 July 1866 - 11 November 1953) was the third daughter and child of Alice and Ludwig IV, the younger sister of Victoria and Yelizaveta Feodorovna, and the older sister of Ernst Ludwig, Friedrich, Aleksandra Feodorovna and Marie. She married Henry, and had three sons: Waldemar, Sigismund and Heinrich.