Now that I think about it, I did play in one on the fly one nighter game that had some people by the name of Carplane and Saltshaker and Juicebox or something. I think that the person was looking at magazines and random objects. But i know this person was a good GM from the past so I think that it was used as more humor.
I had a few characters with names like:
Ville 'Vallaton' Laaksonen: A Ville Vallaton is an actual drink in Finland. Since his name was Ville, and he was a severly ciggarette addicted, mildly alcohol addicted weapons specialist who had the Annoying Neighbor flaw(think Simpsons meets the Family Guy...and a lot of you helped me make them

...explained his addictions). Thus, he was nicknamed after a drink.
Kryztof 'Vader' Gregorcyk: A Polish merc, whom nerds in game were sad to find out his nick wasn't Vader from Star Wars, but after one of the death metal bands of the 20th century which he so loved. Most people in the US couldn't pronounce his name, Vader happened to be the shirt he was wearing at the time, so it stuck.
I've used everything from Gemini(first character ever made, heh), to learning how that in other languages, common words sometimes sound cool for street names. Stian Andersen uses the nickname of Mørke, which means the dark/darkness in Norwegian. They usually just call him Stian at the club.