Ratzinger is the surname of: Joseph Ratzinger, the chief of the Roman Catholic Church and former head of the Congregation for the Doctrine of the Faith, known better today as Pope Benedict XVI. Georg Ratzinger, a Catholic priest, musician, conductor, and brother of Pope Benedict XVI Georg Ratzinger , a Catholic priest, author, politician, and great-uncle of Georg Ratzinger and Pope Benedict XVI Joseph Ratzinger, Sr., the father of Georg Ratzinger and Pope Bened