I think you are making this more complicated than it needs to be. There is only really snake case and camel case. Pascal case is a minor variant of camel case.

Hungarian notation is something quite different, and doesn't really belong in this discussion.

Spinal (or kebab-case) case isn't possible in most languages because minus signs aren't allowed in variable names. So it isn't an option.

Studly caps is just another name for camel case.

So just the two options really.