Hadeans, Jovians, Icarians & Terrans
Yes, Hadeans would be an apt descriptor of this class of planets, including the Pluto crowd. Covers the Kuiper and Ort crowds.
Jovians could designate Neptune mass gas giants up through superJovians with a subclass for those star close Jovians - Icarians.
Finally, for those substantive mass (> 1 Luna) rocky worlds prevalent in the inner solar system, Terrans. Will probably have to add a subclass Oceania to describe those more massive Terran class planets completely covered miles deep by liquid or frozen water.