Nígǔlā Èrshì shì zuìhòu yí wèi xìng Luómànnuòfū de shāhuáng.
Nicholas II was the last tsar named Romanov.
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usage
The ending 夫 is the standard way to write Russian -ov and -ev: 伊万诺夫 Ivanov, 戈尔巴乔夫 Gorbachev. The dynasty is the 罗曼诺夫王朝, and Natasha Romanoff, the Black Widow of the Marvel films, is 娜塔莎·罗曼诺夫.