Se considerarmos esta lista por JKR precisa:

Os livros não mencionam explicitamente quem foi morto para criar cada Horcruxes. Alguns deles podem ser, pelo menos, limitados em possibilidades, mas outros são muito mais difíceis de deduzir quem foi morto para fazê-los a partir do conteúdo dos livros. A coisa mais próxima que temos de uma lista de quem foi morto para fazer cada Horcrux é essa lista, que JKR dá em uma entrevista.

Lady Bella: Whose murders did Voldemort use to create each of the Horcruxes?

J.K. Rowling: The diary – Moaning Myrtle. The cup – Hepzibah Smith, the previous owner. The locket – a Muggle tramp. Nagini – Bertha Jorkins (Voldemort could use a wand once he regained a rudimentary body, as long as the victim was subdued). The diadem – an Albanian peasant. The ring – Tom Riddle Sr.
_{^{- Interview with the Leaky Cauldron}}

Então:

Murta Que Geme - morta pelo basilisco controlado por Tom Riddle.

Hepzibah Smith - envenenado, que Tom culpou seu elfo doméstico Hokey implantando uma falsa memória em Hokey.

“Hepzibah Smith died two days after that little scene,’ said Dumbledore, resuming his seat and indicating that Harry should do the same. ‘Hokey the house-elf was convicted by the Ministry of poisoning her mistress’s evening cocoa by accident.’

‘No way!’ said Harry angrily.

‘I see we are of one mind,’ said Dumbledore. ‘Certainly, there are many similarities between this death and that of the Riddles. In both cases, somebody else took the blame, someone who had a clear memory of having caused the death –’

‘Hokey confessed?’

‘She remembered putting something in her mistress’s cocoa that turned out not to be sugar, but a lethal and little-known poison,’ said Dumbledore. >‘It was concluded that she had not meant to do it, but being old and confused –’

‘Voldemort modified her memory, just like he did with Morfin!”
_{^{- Harry Potter and the Half-Blood Prince, Chapter 20 (Lord Voldemort’s Request)}}

Vagabundo trouxa - causa desconhecida de morte.

Bertha Jorkins - provavelmente morta usando Avada Kedavra, especialmente desde que a habilidade do Lord das Trevas de segurar uma varinha é mencionada.

O camponês albanês - causa desconhecida de morte.

“The Muggle authorities were perplexed. As far as I am aware, they do not know to this day how the Riddles died, for the Avada Kedavra Curse does not usually leave any sign of damage … the exception sits before me,’ Dumbledore added, with a nod to Harry’s scar.

‘The Ministry, on the other hand, knew at once that this was a wizard’s murder. They also knew that a convicted Muggle-hater lived across the valley from the Riddle house, a Muggle-hater who had already been imprisoned once for attacking one of the murdered people.”
_{^{- Harry Potter and the Half-Blood Prince, Chapter 17 (A Sluggish Memory)}}

Então, um deles estava usando um basilisco, um era um envenenamento, um era certamente Avada Kedavra, um era provavelmente Avada Kedavra, e dois foram mortos usando métodos desconhecidos.