If you're looking for something a little less nerdy than some of those suggestions, why not names of streets or neighbourhoods in your city? The main key is tha

If you're looking for something a little less nerdy than some of those suggestions, why not names of streets or neighbourhoods in your city? The main key is that you want a theme with some headroom (you don't want to run out of names at five or six), and you want names that are fairly short and aren't easily misspelled.