I was surprised by how much I liked the name Harliquinn reading it in this thread! I think it's cute, funky and pretty. Looks like it suits her to a T.
And if she gets older and feels like she doesn't want to use it, she can always use Harley or Quinn. But she'll probably just rock her name and no-one will ever question it.
I wasn't aware that it was a disease...never of heard it before, so didn't make the association.