First, there are A LOT of really great ideas here.
Second, if Nathan and Lorien want a new name then they should get one! With that said, what's wrong with CPK survival knife?
I like it because like the names of the other knives in the CPK family it describes what the knife is for and is nice and concise.
CPK EDC-a knife perfect to carry everyday
CPK field knife-a knife to use out in the field to prep food and fire and work with wood
CPK light chopper-a chopper that's, well, light
CPK fighter-a fighting knife
Potato knife-I actually don't know the story behind this one, but I can guess
The CPK XTRM Spartan Tickler or CPK S.E.R.E.-lore or CPK Chuck Norris seem to clash with the rest of the past models. But, maybe the whole point is to shake things up.
Anyways, this is a really fun thread and a neat idea to put some ownership in the hands of forumers. If the desired outcome is to find a cool acronym or unique name, I'm sure it will be found in this thread!
I'd second the already mentioned: expedition, wilderness, camp and especially trailblazer.
My attempt at originality would be: CPK work horse.
EDIT: took too long typing... not that original anymore
$0.02 from a guy who's new around here!