Nikolay Sheremetev (1904-1979) (1904–1979) Parents Dmitry Sheremetev Irina Sheremeteva Children Princess Xenia Nikolaevna Yusupova-Sifris, 10th Princess Yusupov Siblings Yekaterina Sheremeteva Irina Sheremeteva Sergey Sheremetev Praskovya Sheremeteva Yelizaveta Sheremeteva Partners Princess Irina Felixovna Yusupova, 9th Princess Yusupov