Eu acho que é coincidência. Com base no seguinte:
“You are thinking of Portkeys, Harry, which must be ordinary objects, easy to overlook. But would Lord Voldemort use tin cans or old potion bottles to guard his own precious soul? You are forgetting what I have showed you. Lord Voldemort liked to collect trophies, and he preferred objects with a powerful magical history. His pride, his belief in his own superiority, his determination to carve for himself a startling place in magical history; these things, suggest to me that Voldemort would have chosen his Horcruxes with some care, favoring objects worthy of the honor.”
“The diary wasn’t that special.”
“The diary, as you have said yourself, was proof that he was the Heir of Slytherin. I am sure that Voldemort considered it of stupendous importance.”
Harry Potter and the Half-Blood Prince, Chapter 23, Horcruxes
Em segundo lugar, as horcruxes são criadas pela divisão da alma e não do corpo.
“Well, you split your soul, you see,” said Slughorn, “and hide part of it in an object outside the body. Then, even if one’s body is attacked or destroyed, one cannot die, for part of the soul remains earthbound and undamaged. But of course, existence in such a form...”
Harry Potter and the Half-Blood Prince, Chapter 23, Horcruxes