How many popes have been named Giovanni?

All the popes listed below had the given name of Giovanni, In some cases it was a second or third name.

Pope John I

Pope John VIII

Pope John IX

Pope John X

Pope John XI

Pope John XVIII

Pope Gelasius II

Pope Nicholas III

Pope Innocent VIII

Pope Leo X

Pope Julius III

Pope Paul IV

Pope Pius IV

Pope Urban VII

Pope Innocent IX

Pope Innocent X

Pope Clement XI

Pope Clement XIV

Pope Pius VI

Pope Pius IX

Pope Benedict XV

Pope Pius XII

Pope Paul VI