Question: Who is the mother-in-law of Countess Alexandra Von Zarnekau?
Sentence (from "Prince George Alexandrovich Yuryevsky"): Prince George Alexandrovich Yuryevsky (12 May 1872 [30 April 1872 O. S.] – 13 September 1913) was the natural son of Alexander II of Russia by his mistress (and later wife), Catherine Dolgorukov.
Relevant evidence: Yes