No, he hasn't, but there were other people called Matthew Lewis who have.
No, Neville survives.
Yes and harry potter kills him
Yes he does. Neville kills him by destroying Nigini the last Holocrox
His Grandfather.
No, Neville did not die. He killed Nagini, Voldemort's snake and last remaining Horcrux. Between the last chapter and the epilogue, Neville married Hannah Abbot and became Herbology professor at Hogwarts after Professor Sprout retired.
Richard Harris
Harry Potter told Neville Longbottom that Nagini had to die so Neville Longbottom decapitated her.
Nagini - Voldermort's Snake - is also a horcrux so Harry asks Neville to stab it with the Sword of Gryffindor if he (Harry) doesn't make it through the battle. Neville lands up killing the snake, with the sword, also killing the horcrux.
There is no such character in Harry Potter.
There is no Niki in Harry Potter.
the sereies would be called Neville Longbottom. Every thing that happened to harry would happen to Neiville
Yes Voldemort does die, Harry Potter defeats him