For reference, the House of Romanov
(also transcribed Romanoff; Russian: Рома́новы, tr. Románovy, IPA: [rɐˈmanəvɨ]) was the reigning imperial house of Russia from 1613 to 1917. They achieved prominence after the Tsarina, Anastasia Romanova, was married to the First Tsar of Russia, Ivan the Terrible.
Has there ever been a plotline where Natasha was implied to be a lost Romanov, or is it just a matter of someone picking an obviously Russian name ?