hi! a tool thats helped me for ages and still does is this brilliant thing;
http://rinkworks.com/namegen/ , even though the page is a bit old and clunky, it works fantastically! to start out you can just pick default, medium or short names from the first dropdown and hit go; every page refresh gives you new set of random gen names. if you get more into it and learn how the manual generator works, you can get more specific kind of names if you already have a theme in mind. hope it helps!