The former is a stupid analogy, austria isn't even part of germany, and even if it was it'd be a realativly small part.
The latter seems correct, brittain lost ireland and now it lo longer refers to itself as great brittain, I don't know if there's a direct connection but...
The diffrence is during this era, the kingdom of norway is at all times held by one of the other scandinavian kings and yet no one was scandinavia. Granted if denmark managed to declare themselves scandinavia (by being king of the three kingdoms) and sweden then rebelled and became independent then denmark would probably go on calling itself scandinavia and think that it has a claim to sweden (they did that for centuries after the Kalrmar union after all) but if sweden beats them in a war they should have the opion of getting denmark to renounce being scandinavia. Even more so if denmark loses norway too.
I had a similar thing in my milan/italy playthrough, leon has taken all of the iberian peninsula, but castile formed spain and has colonies left. Honestly at this point Leon should be able to proclaim themselves the true spain and force spain back into the castile tag.