Naming of Ship Classes

Faction	Frigates	Destroyers	Cruisers	Battlecruisers	Battleships
Angel Cartel	Gistii	Gistior	Gistum	Gistatis	Gist
Blood Raiders	Corpii	Corpior	Corpum	Corpior	Corpus
Rogue Drones	Alvi	Alvior	Alvum	Alvatis	Alvus
Guristas Pirates	Pithi	Pithior	Pithum	Pithatis	Pith
Sansha's Nation	Centii	Centior	Centum	Centatis	Centus
Serpentis Corporation	Coreli	Corelior	Corelum	Corelatis	Core

Naming of the elite ships

The elite frigs acts as Interceptors (web/scramble) and cruisers as HAC and/or EW-ships.

Angel Cartel	Arch, Angel Webifier, Angel Viper
Blood raiders	Elder
Rogue Drones	Strain
Guristas Pirates	Dire
Mercenaries	Mercenary Wingman
Sansha's Nation	Loyal
Serpentis Corporation	Guardian
Empire factions	Support Frigate

Note: There are more ships that web/scramble and have special abilities.

More info here (out of game): http://myeve.eve-online.com/ingameboard.asp?a=topic&threadID=219388∞