Grand Duchess Anastasia Nikolaevna of Russia
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.