In certain geographical areas it is a popular and also a traditional name.
Sean
John, Paul, Joe, Sean?
Sean Biggerstaff's birth name is Sean Biggerstaff.
Sean Banan's birth name is Sean Samadi.
Sean Kanan's birth name is Perelman, Sean.
"Giovanni" is an Italian equivalent of "Sean."Specifically, the Italian and the Gaelic words are popular proper nouns. They both translate into English as "John." The pronunciation of the Italian first name is "djyoh-VAHN-nee."
According to the IMDB and Wikipedia, Sean Penn's real name is Sean Justin Penn.
Sean Combs' birth name is Sean John Combs.
Sean Rio Amir is Sean Flynn's full name
Sean Combs's birth name is Sean John Combs.
Sean Conant's birth name is Sean Anthony Conant.
Sean Cory's birth name is Sean Cory Cooper.