Guess whose reddit username was discovered by a coworker?

I'm only out to a very few people. I'm not hiding anymore yet I had no reason to tell people. My friend knows I'm a redditor yet I of course told him I wasn't telling him my name. Well, I made the mistake of posting something last week that clearly led back to me. Oops.I convinced him it wasn't me. Don't know how but I did. Going to tell him tomorrow though.