Question: who voldemort killed for each horcrux?
Answer: Tom Riddle killed his dad, Tom Riddle Senior, his mother and mother (maternal grandparents) that created him his first horcruxe — the Gaunt's ring. He killed H. Smith and thefted the Hufflepuff Cup and the Slytherin locket. He horcruxed his diary most hopingly by killing moaning Myrtle with Basilisk.