Pluto

Upon the announcement of the discovery, Lowell Observatory received over a thousand suggestions for names.[22] Three names topped the list: Minerva, Pluto and Cronus. ‘Minerva’ was the Lowell staff’s first choice[23] but was rejected because it had already been used for an asteroid; Cronus was disfavored because it was promoted by an unpopular and egocentric astronomer, Thomas Jefferson Jackson See. A vote was taken, and ‘Pluto’ was the unanimous choice. To make sure the name stuck, and that the planet would not suffer changes in its name as Uranus had, Lowell Observatory proposed the name to the American Astronomical Society and the Royal Astronomical Society; both approved it unanimously. The name was published on May 1, 1930