I didn't think the dwarf planets had standard names, I thought they got alphanumeric designations now.
dwarf planets have their own naming convention.. and no it's not "1 ceres", etc - that was it's asteroid designator.
here is the difference between planets, dwarf planets, and everything else
Planets: Large enough for their gravity to make them roughly spherical, and they dominate their orbit (ie have cleared pretty much all other objects from it)
Dwarf Planets: Large enough for their gravity to make them roughly spherical, but do not dominate their orbits (Ceres is in the asteroid belt)
Everything else: not the above.