In the final Battle of FFVII you fight Bizarro-Sephiroth, then Safer-Sephiroth, and finally a scripted version of Sephiroth.
When the first one came out, it was the developer's expected last game, hence his 'final' fantasy. It turned out the game was a hit, and more were made, but they kept the name.
There are three movies, Final Fantasy spirit within, Final Fantasy 7 Advent Children, and Final Fantasy 7 Last Order
Final Fantasy VII: Advent Children is a movie that takes place after the events of Final Fantasy VII. The movie that takes place before the events of Final Fantasy VII is Last Order: Final Fantasy VII
They never tell you his last name. The characters in Final Fantasy X are only given their first names.
There is no place in Final Fantasy X or X-2 that says he has a last name. In fact, no one seems too have one.
Rikku does not have a last name.
Reno's last name is Sinclair
Barret's last name is Wallace.
Tifa's last name is Lockhart.
AeriS' last name is Gainsborough.
Vincent's last name is Valentine.
Cid's last name is Highwind.