I am writing this entry with one hand since I am holding Hannes on my arms. Anyway, it seems to me that he already knows his name. However, he seems to have another interpretation of it, since instead of just being Hannes, he acts more like "Your Highness."
We carry him around, we push his nice wagon, we feed him whenever he wants to be fed, we give all our money to him and we sing songs to him so he will sleep better. We protect him, and we entertain him. His wish is our command, his command our wish.
In other words, the Little Prince has taken over. Our Hannes is Your Highness.