What is XXX's spouse's name?
Prince Claus of the Netherlands
Claus George Willem Otto Frederik Geert van Amsberg (né Klaus-Georg Wilhelm Otto Friedrich Gerd von Amsberg; 6 September 1926 -- 6 October 2002), later Prince Claus of the Netherlands, was the husband of Queen Beatrix of the Netherlands, and as such was Prince consort of the Netherlands from Beatrix's ascension in 1980 until his death in 2002.
Beatrix of the Netherlands