There were a few other "Mikes in the offshore racing circles, and a couple of other "Mikes" in the fire department I worked for. At some point I became "Gordo". The name stuck.
To this day, if someone said "Mike" I may not know if you're referring to me or not. But I can be a thousand miles from home, riding on the deck of a raceboat in a parade and hear someone yell Hey Gordo! there's no doubt, somebody knows me.