Question: Who is the mother-in-law of Duchess Alexandra Of Oldenburg?
Sentence (from "Duchess Alexandra of Oldenburg"): Born Duchess Alexandra Frederica Wilhelmina of Oldenburg; 2 June 1838 – 25 April 1900) was a great-granddaughter of Emperor Paul I of Russia and the wife of Grand Duke Nicholas Nikolaevich of Russia, the elder.
Relevant evidence: Yes