Cardinal Ratzinger chose this name to honor a peace-seeking pope, not the IXth, who sold the papacy
When she boarded the plane, she saw Cardinal Joseph Ratzinger, who ... With a 
few words in Latin, Pope Benedict XVI did what no pope has done .... Pope 
Celestine V's name has been the one most cited in the news and ...... Benedict IX: 
Sold the papacy to his godfather Gregory VI and resigned in 1045.