Even the curse in the Winchester House had a name. For no name to show up at the time means that most likely, either the name no longer exists, or is inherently unknowable.

To put it another way, there is possibility that it is a being that exists by virtue of being impossible to define. So then, what would happen to such a being, were it to be properly labelled and cataloged?

If my theory is correct, this is another tool we can use.