The planet got its name from the ancient Greek god of the sky Ouranos (Οὐρανός). It is the only planet in the Solar System named after the Greek deity. Uranus is not a classical planet and was unknown to alchemists.
According to Wikipedia,
The symbols for Uranus were created shortly after its discovery in 1781. One symbol, ⛢, invented by J. G. Köhler and refined by Bode, was intended to represent the newly discovered metal platinum; since platinum, commonly called white gold, was found by chemists mixed with iron, the symbol for platinum combines the alchemical symbols for iron, ♂, and gold, ☉. This symbol also combines the symbols of Mars (♂) and the Sun (☉) because in Greek mythology, Uranus represented heaven, and represents the combined power of Mars’ spear and the Sun. Another symbol, ♅, was suggested by Lalande in 1784. In a letter to Herschel, Lalande described it as “un globe surmonté par la première lettre de votre nom” (“a globe surmounted by the first letter of your name”).More photos related to sea glass @ Shutterstock.