I've been naming rocket families after space pioneers. My first sub orbital rockets were Goddard 01 - 03, the first orbit capable craft were Von Braun 01 - 07, the various Munar missions were Armstrong 01 - 04, and my current launch vehicle is the Tsiolkovsky. Just unlocked orange tanks and mainsails last night, so I think I feel another series coming on. Gagarin? Lovell? Hadfield? My newly constructed refueling station doesn't fit this pattern at all, but "Kerbal Valdez" just seemed so fitting...