I had a similar dream once, and it's not as unrealistic as you might think, oddly enough.
We came close a few times. Alanurs, Palnasos, Taop, Ossaet, Topenah, and Lasop/Remton/Nocaneb/Niel have never split off to be their own realms. But I can easily count about 17 realms who came from completely different duchies- many around at the same time.
