Which lady gave birth to XXX?
Prince Andrew of Greece and Denmark
Prince Andrew of Greece and Denmark (Andreas; 2 February 1882 (N.S.) -- 3 December 1944) of the House of Schleswig-Holstein-Sonderburg-Glücksburg, was the seventh child and fourth son of King George I of Greece and Olga Constantinovna of Russia.
Olga Constantinovna of Russia