Frederick IX of Denmark child Queen Anne-Marie of Greece
Marriage and issue
In the 1910s, Alexandrine considered the two youngest daughters of her cousin Tsar Nicholas II, Grand Duchess Maria Nikolaevna of Russia and Grand Duchess Anastasia Nikolaevna of Russia, as possible wives for Frederick,  until the execution of the Romanov family in 1918. In 1922, Frederick was engaged to Princess Olga of Greece and Denmark, his second cousin. They never wed.Instead, on 15 March 1935, a few days after his 36th birthday, he was engaged to Princess Ingrid of Sweden (1910–2000), a daughter of Crown Prince Gustaf Adolf (later King Gustaf VI Adolf of Sweden) and his first wife, Princess Margaret of Connaught. They were related in several ways. In descent from Oscar I of Sweden and Leopold, Grand Duke of Baden, they were double third cousins. In descent from Paul I of Russia, Frederick was a fourth cousin of Ingrid's mother. They married in Stockholm Cathedral on 24 May 1935. Their wedding was one of the greatest media events of the day in Sweden in 1935, and among the wedding guests were the King and Queen of Denmark, the King and Queen of Belgium and the Crown Prince and Crown Princess of Norway.Upon their return to Denmark, the couple were given Frederick VIII's Palace at Amalienborg Palace in Copenhagen as their primary residence and Gråsten Palace in Northern Schleswig as a summer residence.Their daughters are:
Queen Margrethe II of Denmark, born 16 April 1940, married to Count Henri de Laborde of Monpezat and has two sons
Princess Benedikte of Denmark, born 29 April 1944, married to Richard, 6th Prince of Sayn-Wittgenstein-Berleburg and has three children
Princess Anne-Marie of Denmark, born 30 August 1946, married to King Constantine II of Greece and has five children
offspring progeny issue descendant heir