Difficult to say the Dutch were independent from 1813 before that they were part of the French empire (Napoleon assigned his brother as king of the Netherlands so he could sort of control it.) and in 1810 they were annexed by Napoleon after he was not happy with his brothers rule.
That would mean that at the start of the game there shouldn't be a faction of The Dutch, but then somehow there is.
EDIT: In Holland they don't call all of the princes "Prince of Orange" but only
this one, we call the others by name so then it would be William I Frederick