"Oh? It wouldn’t matter if my parents died, then? And what makes you think it was only a couple of dozen anyway? Was there a census of witches and wizards?" Hermione said sharply. "All Muggle-borns were properly accounted for in the 1600’s? All old witches living hidden in remote towns were kept track of? Besides, whether they were actually real witches, or Squibs, or Muggle-borns, or "only’ Muggles, that many people still died. Religious fervor wreaked havoc across Europe for centuries."