for the book, deathly hallows, for the movie, half blood prince Note: the character's name is still Harry Potter.
He was not in HBP.
There is no character of that name in Harry Potter.
There is no character by that Name in Harry Potter.
There isn't a Harry Potter character whose name begins with Gan.
There is no character with that name in the Harry Potter series.
harry potter and the deathly hallows is the upcoming movie
There is no character of that name in Harry Potter
Hermione Granger has the same last name as the character in the movie, who is named Oswald Granger.
Harry Potter and the Goblet of Fire
Other than a Harry Potter character having the name Florence there is no connection. Harry Potter is a fictional character and Florence Nightingale was a real person.
Harry Potter and the Deathly Hallows Part 2