Prince Waldemar of Prussia (1889–1945)

Prince Waldemar William Louis Frederick Victor of Prussia (Waldemar Wilhelm Ludwig Friedrich Viktor Heinrich; 20 March 1889 at Kiel – 2 May 1945 at Tutzing, Bavaria) was the eldest son of Prince Henry of Prussia and Princess Irene of Hesse and by Rhine.

Marriage
Waldemar married Princess Calixta of Lippe-Biesterfeld (14 October 1895 – 15 December 1982) on 14 August 1919 at Hemmelmark.

Haemophilia and death
Waldemar, like his maternal first cousin, Tsarevich Alexei Nikolaevich of Russia; maternal uncle Prince Friedrich of Hesse and by Rhine; and youngest brother Henry, had haemophilia. He died in a clinic in Tutzing, Bavaria because of a lack of blood transfusion facilities. He and his wife fled their home in light of the Russian advance, arriving in Tutzing, where Waldemar was able to receive his last blood transfusion. The U.S. Army overran the area the next day, on 1 May 1945, and diverted all medical resources to treat nearby concentration camp victims, preventing Waldemar's doctor from treating him. Waldemar died the following day, on 2 May.

Honours and awards
Prince Waldemar received the following awards:
 * [[Image:Order of the Black Eagle - Ribbon bar.svg|50px]] Knight of the Black Eagle, with Collar (Kingdom of Prussia)
 * [[Image:Ord.Aquilarossa-GC.png|50px]] Grand Cross of the Red Eagle, with Crown (Kingdom of Prussia)
 * [[Image:PRU Order of Crown ribbon.svg|50px]] Knight of the Prussian Crown, 1st Class (Kingdom of Prussia)
 * [[Image:D-PRU Hohenzollern Order BAR.svg|50px]] Grand Commander of the Royal House Order of Hohenzollern (Kingdom of Prussia)
 * [[Image:D-PRU Princely Hohenzollern Order BAR.svg|50px]] Cross of Honour of the Princely House Order of Hohenzollern, 1st Class (House of Hohenzollern-Sigmaringen)
 * [[Image:BAD Order of Fidelity ribbon.svg|50px]] Knight of the House Order of Fidelity, 1909 (Grand Duchy of Baden)
 * [[Image:Ludwig Order (Hesse) - ribbon bar.png|50px]] Grand Cross of the Ludwig Order, 19 March 1910 (Grand Duchy of Hesse and by Rhine)
 * [[Image:SAX Order of the Rue Crown ribbon.svg|50px]] Knight of the Rue Crown (Kingdom of Saxony)
 * [[Image:JPN Daikun'i kikkasho BAR.svg|50px]] Grand Cordon of the Order of the Chrysanthemum, 6 May 1912 (Empire of Japan)
 * [[Image:St.AlexanderOrder-ribbon.svg|50px]] Grand Cross of St. Alexander, with Swords, 1916 (Kingdom of Bulgaria)