There is no pope George III.
Pope Victor III died of natural causes in 1087. Pope Urban III succeeded him. Pope Victor III became pope in 1085.
Pope Anastasius III reigned after Sergius III from April 911 until June 913.
Pope Innocent III was born in 1160.
Pope Gregory III was born in 690.
Pope Celestine III was born in 1106.
Pope Victor III was born in 1026.
Pope Lucius III was born in 1100.
Pope Nicholas III was born in 1210.
Pope Stephen III was born in 720.
Pope Leo III was born in 750.
Pope Sylvester III died in 1062.