What I remember is that Satriani was asked what he wanted to name the pickup, and it was Joe who came up with the notion "why can't pickups have names like people?" and then the name was Fred. I don't know if he came up with Fred, or Steve Blucher, or whoever, but I'm pretty sure Joe is credited for having the idea to use people names. That extended out to the Norton, but again I don't know if there was any correlation there. One thing I heard (but it doesn't sound like it's true) is that the Norton is the closest pickup to what went in the EB/MM Van Halen guitars. General consensus is that it's more like a mix of the Tone Zone and Air Zone, but the reason the rumor got started was the Honeymooners' Ed Norton. (Ed Norton, Ed Van Halen)
Hopefully the trend will not work the other way around. I don't want to hear of anyone naming their child "X2N, D-Sonic, or Megadrive"

Although "Megadrive Johnson" would look pretty cool on a driver's license...