How about Intel Pentium Core Duo and Solo? I almost like that better. AMD has the shiznit name though. Athlon is really a powerhouse name and I wish Intel would've followed suit.
Most of the times, big corporations do outsource their Corporate Image make-up to well known & prestigiated designers and/or to large Marketing & Communication houses.
One familiar example is the the actual IBM logo, created by the late Paul Rand, in 1971 (in 72, he redesigned it, giving it the stripe-like appearance it has today & merited a curious comment "why does it look like a barbershop's sign?!");
http://www-03.ibm.com/ibm/history/exhibits/logo/logo_1.html
Sometimes, as design trends change, so does the Corporate Image/Brand Name supplier. AMD chose the "Master-McNeil" firm to give some
shape &
sound to their products (
AMD64, Duron, Athlon, Sempron, Opteron, Turion, ...); actually, the designations have (as is usual) a greek or latin root, for several reasons: they're easier to spell all over the world (which is not always the case with anglo-saxon roots... or chinese's!), they are easy to memorize (more often than not...) and they convey an intended meaning (for those curious/aquainted with Greek/Latin!):
http://naming.com/consumertech.html
That's why "Pentium" came to life & not "Hexium" or "Heptium"... or "Tetrium"...; that's also why Intel calls its new uArchggghhh!!! "Core" (which comes from the latin
cuore - heart - an emotional conotation, also meaning centre or central), and "Solo" (single) & "Duo"...
I'm not sure but, most probably, the numbering/alphanumeric part of it is chosen by the corporation's... marketing "gurus"!
Cheers!