Pope Felix III died in 492.
Pope Felix I died on 274-12-30.
Pope Felix IV died in 530.
Saint Felix III(483 - 492) is the most common answer, but there is no known one answer.
Pope Victor III died of natural causes in 1087. Pope Urban III succeeded him. Pope Victor III became pope in 1085.
Pope Sylvester III died in 1062.
Pope Adrian III died in 885.
Pope Anastasius III died in 913.
Pope Innocent III died July 16, 1216.
Pope Pius III died on 1503-10-18.
Pope Stephen III died on 772-01-24.
Pope Boniface III died on 607-11-12.
Pope Eugene III died on 1153-07-08.