Dobby died in Harry Potter and the Deathly Hallows.
Arthur Weasley didn't kill anybody throughout the series. His wife, Molly Weasley, killed Bellatrix Lestrange.
Bellatrix Lestrange's maiden name is Black. If you are talking about who potrayed her in the movies, her name is Helena Bonham Carter.
A silver knife, thrown by Bellatrix.
It's Madame Lestrange. Meaning, Bellatrix Lestrange. With a courtesy title in front, her name would be Mrs. Lestrange, or Madame Lestrange.
Bellatrix Lestrange. She is the sister of Draco Malfoy's mum. Bellatrix is evil I hate her.
No, Dobby does not return. He gets killed by Bellatrix Lestrange in the Deathly Hallows.
Bellatrix Lestrange.
Saves peoples' lifes then gets killed by Bellatrix Lestrange.
Dobby was killed when Bellatrix Lestrange threw her silver knife at him as he disapparated from Malfoy Manor. Harry buried him at Shell Cottage.
When Dobby helped Harry Potter and his friends escape from the Malfoy Manor. He died at Shell Cottage, due to Bellatrix Lestrange's knife going through his chest.
He got hit by a dagger thrown by Bellatrix Lestrange.
After almost killing Bellatrix Lestrange in the 7th book, Dobby says to her, "You will not harm Harry Potter."
Bellatrix Lestrange was the one who killed Sirius Black in the battle of the Death Eater's and the Order of the Phoenix in the Ministry of Magic.
He is alive during the first half. He is later killed / stabbed by bellatrix lestrange while saving harry.
bellatrix did you can read it in the 5th book
Dobby died in Harry Potter and the Deathly Hallows.