To stretch a metaphor to death and beyond - if it looks like a duck, quacks like a duck, nobody knows the duck was destroyed and rebuilt almost exactly identical to how it was before, every other rebuilt duck is still using the old names they had, and there are plenty of people in the multiverse who knew the old duck's name and have no reason to believe this duck to be a new duck, then as far as I am concerned, it's the same duck and the old name still stands.