I came across this very unusual name?

It's great as a young child's name, but I can't imagine her enjoying it so much as a teenager or adult, so she might end up just Grace. That said, it doesn't sound bad, it's more the connotation of "lullaby" as a song to send a baby to sleep, which is the only thing most people would think of, even though personally I think it sounds like the name of a poet or singer (: