In Irish and Scottish Folklore, the Aos Si(also called:Aes Sidhe (an older form of the word)anddaoine sídhe)are a category of supernatural beings and spirits that are said to walk among the living. Much like the more commonly known Faery, they come in a variety of types with varying behaviors. Aos Si literally translates to, “People of the Mounds,” which acts as testament to their dwelling beneath the earth, or in fairy mounds (Also called, “ The Sidhe,” which means, "Mounds" ). Some have stated that they are also known to make their home in the western sea, and more extraordinarily, in an invisible world that coexists with our own, but remains separated by a veil of some sort, this could mean that they are literally otherwordly beings. Because of this, on top of being thought of as spirits, some believe them to be theAncestors, Spirits of the natural world, or even Gods and Goddesses.