While searching for atheist or non-religious names, I came across your page: http://www.positiveatheism.org/mail/eml8480.htm
There appears to be a dearth of compilations of specifically non-religious names, so I decided to write a short list. It is posted to this site: http://www.helium.com/tm/683760/religious-connotations-always-natural
Feel free to link, if you want!
Tucker Kennedy Lieberman