Who is Mary, Crown Princess of Denmark's mother-in-law?
Frederik, Crown Prince of Denmark Frederik, Crown Prince of Denmark, Count of Monpezat, {'1': ", '2': ", '3': 'RE, SKmd', '4': "} (Frederik André Henrik Christian; born 26 May 1968) is the heir apparent to the throne of Denmark. Frederik is the elder son of Queen Margrethe II and Henrik, the Prince Consort.
Sophie Elisabeth Pentz Sophie Elisabeth of Schleswig-Holstein (20 September 1619 – April 29, 1657) was a daughter and the eldest child of king Christian IV of Denmark and Kirsten Munk. She shared the title "Countess of Schleswig-Holstein" with her mother and siblings.