Yes you can.
Just a few days ago, 'The EagleBook' changed its name to 'The CIA World Factbook', for example: http://itunes.apple.com/us/app/eaglebook-cia-world-factbook/...
Just a few days ago, 'The EagleBook' changed its name to 'The CIA World Factbook', for example: http://itunes.apple.com/us/app/eaglebook-cia-world-factbook/...
That would trigger another round of reviewing, so in theory you shouldn't be able to "sneak" a name change past Apple.