From his father's second marriage he had one half sister, Olga.
She was born in London the daughter of Prince Andrei Alexandrovich of Russia and his second wife Nadine Sylvia Ada McDougall (1908–2000).
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She joined the Romanov Family Association in 1980 and currently serves as a committee member.
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In 2006, she was on Australian Princess (an Australian reality TV show) giving advice to competitors.
Her father remarried and Xenia had one half sister, Princess Olga Andreevna Romanoff.
Xena: Warrior Princess | Anne, Princess Royal | Princess Diana | Princess Alexandra, The Honourable Lady Ogilvy | The Princess Bride | Princess Royal | Princess Margaret, Countess of Snowdon | Princess Anne | Princess Alexandra | Princess Margaret | A Little Princess | Victoria, Princess Royal | Princess Margaret Hospital | Princess Louise, Duchess of Argyll | Princess Elizabeth | Princess Beatrice of York | princess | Olga Chernysheva | Princess Victoria of Saxe-Coburg-Saalfeld | Princess of Wales | Olga Neuwirth | The Princess Bride (film) | Princess Louise | Princess Eugenie of York | Princess Benedikte of Denmark | Princess Augusta of Saxe-Gotha | Olga Petrova | Olga Fatkulina | Princess Amelia of the United Kingdom | Princess |