Sister-in-law of the composer (d. around 1919), born Olga Sergeyevna Denisyeva (Ольга Сергеевна Денисьева; known after her marriage as Olga Sergeyevna Chaykovskaya (Ольга Сергеевна Чайковская).
In 1872 Olga married the composer's brother Nikolay Tchaikovsky (1838–1911), and in 1886 the couple adopted the illegitimate son of Nikolay's niece Tatyana Davydova, who took the name Georgy Tchaikovsky (b. 1883).
Tchaikovsky's correspondence with Olga Tchaikovskaya:
This page was last updated on 14 February 2013