Marie Kalergi (1840–1877)

Marie Kalergi (16 January 1840 – 11 March 1877) was a Polish noblewoman. Born in Saint Petersburg, she was the daughter of Jan Kalergi and the pianist Marie Nesselrode. Kalergi was married on 27 June 1857 in Paris to Franz Karl Coudenhove (1825-1893), founding the Coudenhove-Kalergi family. Their children were:

Marie Kalergi died, aged 37, at Ronsperg.

...
Wikipedia