Royalty killed in the war:
Prince Heinrich of Bavaria - KIA Monte Sule, Transylvania 8 Nov. 1916(German)
Prince Friedrich Wilhelm of Hesse - d. of wounds received in action near Kara (Kurm) Orman, Dobroudja, Roumania 12/13 Sept. 1916(German)
Prince Maximilian of Hesse- d. of wounds received in action at Saint-Jean-Chappelle, near Bailleul, France 13 Oct. 1914(German)
Prince Umberto of Savoy, Count of Salemi- KIA Crespano del Grapfen 19 Oct. 1918 (Italian)
Prince Heinrich of Liechtenstein - d. of wounds received in action at Warsaw 16 Aug. 1915 (served in Austrian Army)
Prince Ernst of Lippe- KIA Villiers-les-Guise, near St-Quentin, France 28 Aug. 1914(German)
Prince Friedrich Wilhelm of Lippe- KIA Liege, Belgium 6 Aug. 1914 (oldest royal killed, age 56 and also first to be killed )(German)
Prince Friedrich Karl of Prussia -KIA St-Bouvray, near Rouen, France 6 April 1917(German)
Prince Heinrich XLI Reuss - KIA Bivolita, Roumania 29 Nov. 1916(German)
Prince Heinrich XLIV Reuss- d. of wounds received in action at Laon at Glochau 29 Oct. 1918 (German)
Prince Heinrich XLVI Reuss(brother of above) - KIA (at the battle of La Bassée, Belgium 20 Oct. 1914(German)
Prince Heinrich XXXVIII Reuss-- KIA Ligny, near Brabant-sur-Meuse, Belgium 22 Mar. 1918(German)
Prince Oleg Constantinovitch - d. of wounds received in action (while in a cavalry charge against
the Germans) at Vilna 12 Oct.1914 (Russian)
Prince Ernst of Saxe-Meiningen - KIA Maubeuge, Nord, France 27 Aug. 1914(German)
Prince Friedrich of Saxe-Meiningen (father of above)- kia Tarcienne, near Charleroi, Belgium 23 Aug. 1914 (the only father/son duo to be killed)(German)
Prince Albert of Saxe-Weimar-Eisenach - KIA Gouzeaucourt, Nord, France 9 Sept. 1918)(German)
Prince Wolrad Friedrich of Waldeck and Pyrmont - KIA Moorslede, Belgium 17 Oct. 1914(German)
Source:
http://hydrogen.pallasweb.com/cgi-bin/y ... 1106679991