Other Royalty: 2 queen consorts, 1 princess/queen consort
Amalie of Oldenburg (middle name Frideriki)   1836-1862   Greece  
Sofía of Spain (middle name Frideriki)   1938-1962; 1975-2014   Denmark; Greece; Spain  
Friederike of Hanover (a.k.a. Frideriki)   1947-1964   Greece