Earlier quoted context omitted.
I'm afraid you'll need to look up "Habsburg" yourself.
Nathan is right though. It specifies a Habsburg jaw, not that the frog is a Habsburg king/prince. It's understandable that the LLM will hallucinate a king from this, but it isn't what's being asked of it.
Adding things that are not explicitly stated in the prompt but that are probable are the main benefit of AI, as far as I am concerned.