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.
Neville Longbottom became the Herbology teacher at Hogwarts.
Neville Longbottom? Augusta
No, Neville married Hannah Abbott and Luna married Rolf Scamander.
No, Neville survives through to the end of the series.
Neville longbottoms date to the Yule Ball was Ginny Weasley