Question: Who is Princess Irina Nikolaïevna Orlova's maternal grandmother?
Sentence (from "Princess Irina Nikolaïevna Orlova"): Princess Irina Nikolaïevna Orlova (March 1, 1918–September 16, 1989) was the eldest child of Prince Nicholas Vladimirovich Orlov and his wife, Princess Nadejda Petrovna of Russia.
Relevant evidence: Yes