Family:Prince John Constantinovich of Russia and Princess Helen of Serbia (1)

Watchers
Parents: Grand Duke Constantine Constantinovich of Russia and Princess Elisabeth of Saxe-Altenburg
Prince John Constantinovich of Russia
b. 5 Jul 1886
d. 18 Jul 1918
Parents: Peter I of Serbs, Croats and Slovenes and Princess Zorka of Montenegro
Princess Helen of Serbia
b. 4 Nov 1884
d. 16 Oct 1962
Children
BirthDeath
1.
Prince Vsevolod Ivanovich of Russia
20 Jan 1914
18 Jun 1973
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