FELIX, the name of several Roman pontiffs. Felix I. was chosen bishop of Rome in 271, and suffered martyrdom in 275. Felix II., sometimes styled III. on account of an anti-pope who assumed the former title, reigned from 483 to 492. Felix III., called also IV., succeeded to the papal throne in 526, and died in 530. A detailed account of Amadeus VIII., Count of Savoy, who became pope under the title of Felix V., is given under AMADEUS.