Which recognized planet is explicitly named after a Greek deity?

Uranus

Uranus stands out among the eight recognized planets because it is the only one whose name honors a purely Greek deity rather than a Roman one. It is named after Ouranos, who is the primordial Greek god representing the personification of the sky itself. While most Roman gods have direct Greek counterparts (like Jupiter being Zeus), Uranus explicitly honors the earlier stratum of Greek cosmology, predating the Olympian rulers established by Roman equivalents. This choice broke the standard Roman naming pattern when the planet was discovered in 1781, though the scientific community ultimately favored maintaining mythological continuity over an alternative name like *Georgium Sidus*.