Mine is a combination of my then career, the CPU I wanted and my sheer ineptitude at selecting a forum username.
I had been a long time lurker of this forum, reading, educating myself about all things IT.
It was only when I needed to ask a question that I signed up. At that time, I was serving in the Royal Air Force as a Policeman. We had many (un)affectionate names amongst Servicemen, one of the least insulting was 'The Feds'. Much akin to the FBI.
At the same time, I was building a new machine about the same time the 1st gen iProcessors were released by Intel. I desperately wanted an i7 920, so the username FBi7 was born.
FWIW, I couldn't afford an i7 920, so I got an i5 750 instead. When that died, I bought my current i5 4690k.
About 9 months ago, I built my mate an i9/RTX2080 rig with all components purchased from ocuk.
I've never owned an i7 CPU
I now have an i7 CPU