My name is Quinn.
It's easily mistakable (evidently) for Glen, Ken, Kim, and various other one-syllable names. I usually just roll with it. Unless they'll need to know my name later.
As for nicknames, if you have a one-syllable name, people will generally lengthen it--so for a long time I was "Rin Quinn Tin," "Quinnie the Pooh," "Quinderella," "Quinnaroni," "Quinnarama-lama-ding-dong," and just about everything else you can fit "Quinn" into.
And "The Mighty Quinn." Which wasn't bad.
Quinnnnnnnnnnnnnnnnnnnn