It could be a play on words also. For all we know, His name could be Myer and he just left out one letter. I know of a couple of people who have taken their first name, reversed the letters for their user name, Cram (Marc).
We tend to assume we know the pronunciation for a word in print. Most people would pronounce NIC as Nick. I've been told by an author that in his story, NIC is pronounced Neek. Another example would be my name, Jan. People is some countries would pronounce it as Jon while in other countries as Yan.
Personally, I voted for the first choice. I don't care what you call me, just don't call me late for dinner.