Obviously the first four are Bretonia, Liberty, Kusari, and Rheinland. That's easy.
Crayter is another one, bringing the count to five.
Malta and Crete can be counted as six and seven, making us eighth, because we reject Gallia's legitimacy.
An alternate way to argue it is that Hispania is sixth, and suffering an unfortunate civil war, and the Coalition is seventh, and we still reject Gallia.
Or you can discount Crayter and put Gallia on the list, but given that we're even smaller it'd be kinda rude to skip over them with no particular diplomatic reason.