Was uranium named after uranus or the other way around, and the same as mercury and the planet mercury?
The name mercury originates from the god Mercurius to whom the Neo-Platonists and alchemists devoted the element after it was discovered.
But that is not the case for naming of Uranium. It was discovered in 1789 by Martin Klaproth, a German chemist while analyzing a black mineral, named pitchblende, obtained from a silver mine in Saxony, Germany. Klaproth examined the mineral and found that it consists chiefly of sulphur, combined with a peculiar metal to which he gave the name Uranium. This name was given after Uranus, the new planet discovered a few years earlier by another German-born scientist, William Hershel.