The game isn't "caching" names as far as I know. The name generator does use many NPC names and surnames, however. Here's an example of a Chalahko NPC from the original 1.0 release:
http://ffxiv.gamerescape.com/wiki/Qhas_Chalahko
http://ffxiv.gamerescape.com/wiki/Qhas_Chalahko
Yvelont Navarre
Parn Paparn
IC Blog for Yvelont: http://never-your-pawn.tumblr.com
OOC Blog: http://navarre-again.tumblr.com
Parn Paparn
IC Blog for Yvelont: http://never-your-pawn.tumblr.com
OOC Blog: http://navarre-again.tumblr.com