(Antonino) Giovanni Ribisi, American actor; twin brother to Marissa Ribisi
Giovanni "Gianni" Versace, (d. 1997) fashion designer
'Manila' John (Giovanni) Basilone, national WWII hero who received the Medal of Honor for his actions during the Battle of Guadalcanal
Giovanni Sforza, character in the Showtime series "The Borgias"
Giovanni was the primary antagonist in the early Pokemon games such as Pokemon Red/Blue/Yellow...
Giovanni Auditore, character in the game 'Assassin's Creed II'