I've only named the FFI characters after the main characters from FFV. I usually name my FF3j characters after other FF characters, such as: Cloud, Zidane, Terra and Cecil, or Auron, Beatrix, Aeris and Golbez. I know, that's a bit too many female characters for FFIII, but it doesn't really matter since most classes are asexual anyway. Since FFIII DS has default names for the characters, I'll just let them keep their default names.