Every full moon has a name, and often two or three names. The full moons are named by month, and again by where it falls in the season, and the second full moon in a month is a "blue moon." There are also special cases, like the "super moon" we saw last month. These names came about by common usage, and are listed and explained at EarthSky. Link -via the Presurfer
(Image credit: Flickr user Ava Verino)