Prince John Constantinovich of Russia Royalty
Prince John Constantinovich of Russia (Russian: Иоанн Константинович) (5 July 1886 – 18 July 1918), sometimes also known as Prince Ioann, Prince Ivan or Prince Johan, was the eldest son of Grand Duke Constantine Constantinovich of Russia by his wife Elisaveta Mavrikievna, née Princess Elisabeth of Saxe-Altenburg. He was described by contemporaries as a gentle, religious person, nicknamed Ioannchik by his relatives.
Personal facts
| Birth date | July 05, 1886 |
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| Date of death | July 18, 1918 |
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| Parents | Grand Duke Konstantin Konstantinovich of Russia Princess Elisabeth of Saxe-Altenburg (1865–1927) |
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