Also, check on PC Sims in the Sims2 Graveyard. http://sims2graveyard.com/download.html I've been using it in my game for years, through all EP and SP with no issues. ^_^
I have about 6 baby name books that I use. I try to keep a theme to the names--father's name begins with ---so will the son's, ect. But most times, it's just whatever catches my eye while I flip through the book.