My most recent game I have used Animes as class names and characters from each for individual ship names. It works quite well, although this is just a mess around campaign whilst waiting for 5.7. When 5.7 comes out I'll probably do the same theme, but actually put some thought into which classes best fit which name rather than doing it fairly randomly. But for example, the Index II class (which is now mostly obsolete) contains the PFS Tsuchimikado, the PFS Ruiko, PFS Mikoto, PFS Hamazura and the FPS Fukiyose. The Koismegeru fleet (which was recently decimated in conflict with the humans) has the Itsukushima, the Kamioka and the Suion. A full list can be obtained by wikipedia'ing whatever class name I decide on.