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.
Sonja Bernadotte Sonja Anita Maria Bernadotte, Countess of Wisborg (née Haunz) (7 May 1944 – 21 October 2008) was the widow of Count Lennart Bernadotte, grandson of Sweden's King Gustaf V through his father, Prince Wilhelm, the king's second son, married in Mainau on 29 April 1972.