Question

Who was the owner of Helga Hufflepuff's cup before Tom Riddle stole it?

Answer 1

hola
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according to the movie,  they never mentioned who owned it.  but said they said that it was created by Helga Hufflepuff

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hope my answer helped u !!!!!!!

Answer 2

The owner of Helga Gufflepuff's cup before Tom Riddle stole it was Hepzibah Smith. Tom Riddle stole it from her to make one of the Horcrux.