Who is Mary, Crown Princess of Denmark's mother-in-law?
Mary, Crown Princess of Denmark Mary, Crown Princess of Denmark, Countess of Monpezat, {'1': ", '2': ", '3': 'R.E.', '4': "} (Mary Elizabeth; "née" Donaldson; born 5 February 1972) is the wife of Frederik, Crown Prince of Denmark. Frederik is the heir apparent to the throne, which means that should Frederik succeed, she will automatically become Queen of Denmark.
Princess Olga of Greece and Denmark Princess Olga of Greece and Denmark (Greek: Πριγκίπισσα Όλγα της Ελλάδας και Δανίας , Serbian Cyrillic: "Кнегиња Олга Карађорђевић"; 11 June 1903 – 16 October 1997) was the granddaughter of King George I of Greece and wife of Prince Paul, Prince Regent of the Kingdom of Yugoslavia.