Darker than Voldemort

There's a secret about Voldemort. He has a daughter that was taken away from him. There was a rumor that the baby died. There were other rumors about the baby being killed by Voldemort, the baby being locked up, and some about the baby taken to the muggle world. The secret is that one of the rumors were true.

Which one?

The one that she was taken to the muggle world.

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