Princess Tatiana Constantinovna of Russia (23 January 1890–28 August 1979) Daughter of Grand Duke Konstantin Konstantinovich of Russia and Elisaveta Mavrikievna, née Princess Elisabeth of Saxe-Altenburg. In 1911 Tatiana married Prince Constantine Bagration of Mukhrani , a Georgian serving in a Russian Imperial Guards regiment. She was the first daughter of the Romanovs to openly marry a Russian subject or non-dynastic prince since the dynasty ascended the throne in 1613.
In 1883 the Emperor granted to the children born out of wedlock to Konstantin Nikolaevich Romanov (1827-1892) Russia the name Knyazev & hereditary nobility. But misfortune soon came to Konstantin. Levushka “Lev” Konstantinovich Knyazev (1883–1885) fell ill with scarlet fever. He received a telegram from Anna (1847-1922) that the boy died. 4 days later, the eldest son Izmail “Malle” (Ishmael) Konstantinovich Knyazev (1879–1885) fell ill. All hoped for a miracle, but again his son died.