What name did the pope's most often take?
Pius 
Paul
John
Sixtus
Cardinal Jorge Mario Bergoglio became the first Pope to choose the name Francis, but here is a list of the top ten most popular pontiff names:  John - 21  Benedict - 17  Gregory - 16
reach: rather globalChristianitychurchculturehistorypopesVaticanVatican City
Answers by country
Pius 
Paul
John
Sixtus
answers
 Republic of Ireland
Republic of Ireland18
 Germany
Germany121
 the United States
the United States89
 Australia
Australia14
 Spain
Spain11
 the Netherlands
the Netherlands16
 the United Kingdom
the United Kingdom77
 France
France13
 India
India11
 Poland
Poland14648
 Greece
Greece19
 Italy
Italy12