2) Classical liberals are not libertarians. “Libertarian” was a synonym for anarchist up until fairly recently. Even using the contemporary American definition of “libertarian”, not all classical liberals would necessarily fit the bill e.g. Thomas Paine.

3) Minarchists are essentially quite radical classical liberals.

4) Neolibertarians aren’t libertarians at all, by your definition of them. They are neoconservatives with a strong economic liberal streak.

5) Objectivism isn’t libertarian.

6) Paleolibertarianism is sometimes, but not always, libertarian. It is more in the tradition of Edmund Burke and Ron Paul than Tucker, Spooner, Rothbard et cetera.