No Name

Not too long ago I got myself into a slightly awkward situation. I mean, not super-awkward or anything. Just a little bit. So, my name is rather unusual, and lots of times people find it hard to pronounce or hard to spell, whatever. Over the years I have gotten so many different variations on it. People call me Marcy, Marisa, Mary-say, Maurice, Mar-eess, Marisea, etc. Generally I just correct people and go on with it. But there are always a few who don't really even understand how to say my name after they hear it. They still keep calling me Meredith or Marcy, or anything that sounds sort of similar and makes sense to them. One time, after an entire semester of class in school, my dad tried to call the school to talk to my really intelligent instructor about me, and Mr. Brains couldn't even figure out who I was because he'd been calling me "Marcy" the entire time. I gave up trying to correct that guy after the first week of class. Roll call was so pleasant after that.
Mr. Brains---Marcy?
Maryse---Here.
(At that point everyone in the class who actually does know my name looks over at me, waiting for me to correct him. They seem to pity me when I don't, or at least think it is a little crazy that I've been defeated in the battle to get the instructor to understand that the "Y" actually comes before the "S" in my name. It gets slightly more pitiful each day of the semester.)
Okay, onto the more current story. The other day I went to drop something off at another department at work. I got over there and left the paperwork with a guy that I often see in that department. We do a little small talk here and there, and say "hi" when we happen to see eachother during the day, but we don't really know eachother. This time, he really decides to branch out. And he says, "Thanks Mar***, it was good to see you again." The thing is the "Mar***" was completely indecipherable. He could have said, "Maryse," maybe. But I really think he said, "Marcy." But I couldn't exactly correct him when I wasn't even sure that he said it wrong. So here I am again, with someone else calling me the wrong name, and no logical place to correct him. I'm sure the situation will develop into something more awkward in the future. He'll probably come over to my department with some paperwork for "Maryse," and then he'll ask where she is, and I'll be standing right there, and a co-worker will say I'm right there, and then he'll wonder why I never told him what my name really was. It should be fun.