Pluto

Pluto is the Latinized form of the Greek name Plouton (Πλούτων), derived from the Greek word ploutos (πλοῦτος) meaning "wealth". In Greek mythology, Pluto was an alternate name for Hades, the god of the underworld. The name Pluto was used to emphasize the underworld’s role as a realm of hidden wealth, including precious metals and fertile soil that nourished crops from below the earth. Hades was the brother of Zeus and Poseidon, and after defeating the Titans, he drew lots with them to rule the underworld, while Zeus took the sky and Poseidon the sea.

In Roman mythology, Pluto was adopted as the direct equivalent of the Greek god, maintaining his association with death, riches, and the afterlife. The name Pluto was especially used for the god when acting as a judge of the dead or when depicted with symbols of abundance, such as a cornucopia. His wife was Proserpina (the Roman Persephone), whom he abducted to the underworld, a myth that explained the changing seasons.

Cultural and Astronomical Significance

Pluto is also the name of a dwarf planet discovered in 1930 by Clyde Tombaugh. For decades, it was considered the ninth planet of the Solar System, but in 2006, the International Astronomical Union reclassified Pluto as a dwarf planet after adopting a new definition that required a planet to have cleared its orbit of other debris. Despite its reclassification, Pluto remains culturally significant; it is the largest known trans-Neptunian object and orbits between the Sun at 30 to 49 astronomical units. Its surface is composed of ice and rock, and it has a pale heart-shaped region known as Tombaugh Regio, visible in images from NASA's New Horizons mission, which flew by Pluto in 2015.

• Meaning: "wealth"
• Origin: Greek (Plouton), Latinized as Pluto
• Type: First name (used primarily in mythology)
• Usage Regions: Greek, Roman mythology; international astronomy