The name She'ol is actually Hebrew for "Underworld," I think. Basically, It was the name for the place one's soul goes to before it was called "The Lake of Fire," or H-E-Double Hockey Sticks. Before being a place of punishment, She'ol was just...there. You die, go to She'ol, and that's it. I, however, thought it was interesting, and thought the word "She'ol" made a good female demon name.