Category:Ioann Konstantinovich Romanov

**Prince John Constantinovich of Russia**
	Russian prince (1886-1918)
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Date of birth	5 July 1886; Pavlovsk
Date of death	18 July 1918; Alapayevsk
Manner of death	homicide;
Cause of death	gunshot wound;
Country of citizenship	Russian Empire;
Educated at	Nikolaevskaya Cavalry School;
Occupation	politician; military personnel;
Noble title	knyaz;
Family	Holstein-Gottorp-Romanov;
Father	Grand Duke Konstantin Konstantinovich of Russia;
Mother	Princess Elisabeth of Saxe-Altenburg;
Sibling	Princess Vera Constantinovna of Russia; Princess Tatiana Constantinovna of Russia; Prince Igor Constantinovich of Russia; Prince Constantine Constantinovich of Russia; Prince Georgy Konstantinovich of Russia; Prince Oleg Konstantinovich of Russia; Prince Gabriel Constantinovich of Russia;
Child	Vsevolod Ivanovich of Russia; Princess Catherine Ivanovna of Russia;
Spouse	Princess Jelena of Yugoslavia (1911–);
Award received	Order of St. Andrew; Gold Sword for Bravery; Order of Saint Stanislaus, 1st class;
Authority file
	Q524437; ISNI: 0000000450944931; VIAF ID: 316737202; GND ID: 1139471090; Library of Congress authority ID: no2018004566; Bibliothèque nationale de France ID: 149783025; NL CR AUT ID: js2018981145
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Prince Ivan or Prince Ioann Konstantinovich of Russia (Иоанн Константиович) (July 5, 1886–July 18, 1918), sometimes also known as Prince John or Prince Johan, was the eldest son of Grand Duke Konstantin Konstantinovich of Russia by his wife Elisaveta Mavrikievna, née Princess Elisabeth of Saxe-Altenburg. He fell in love with the fair and strong-willed Princess Jelena of Serbia. They married and had a son, Prince Vsevolod Ioannovich (20 January 1914 - 18 June 1973), and a daughter, Princess Ekaterina Ioannovna (12 July 1915 - 13 March 2007).

He was murdered in July 1918 by the Bolsheviks along with his brothers Prince Konstantin Konstantinovich and Prince Igor Konstantinovich, his cousin Prince Vladimir Pavlovich Paley, and other relatives and friends.