Her maternal grandfather is Nicholas Romanov , Prince of Russia , which makes her a great - great - great - great granddaughter of Emperor Nicholas I of Russia .
( Romanoff is a variant romanization of the Russian surname Romanov . )
Romanov 's maternal grandfather is Nicholas Romanov , Prince of Russia , which makes her a great - great - great - great granddaughter of Emperor Nicholas I of Russia .
( Romanoff is a variant romanization of the Russian surname Romanov . )