What's in a Name?

With agility trials potentially coming sooner than we ever thought, I've begun thinking about what Marge's registered name will be.  Most organizations require an official or "full" name in addition to the dog's call name, even for mixed breeds like Marge.  I had previously thought that getting to choose a full name was an activity reserved only for owners of purebreds, but I was wrong.

I could simply register her as "(insert prefix here)'s Marge," but getting to choose an actual name that holds some meaning would probably be a lot more fun.

The original name that I thought of was "Northbound Fly by Night."  Northbound - for coming north from Georgia.  Fly - for speed, flying around the agility course.  Night - for being black in color.  I thought it was abstract yet witty, kind of dark and mystical in feel.  I feel like it holds a lot of meaning, without readily giving up that meaning to the whole world.

My only issues with it were "Northbound" sounding like a prefix or kennel name, when it's not, and it's length.  It's kind of a wordy name, I feel.  I also think it might be too formal sounding for a mixed breed only competing in performance events, and might be construed to be a joke when it's really supposed to be serious.  It also has nothing to do with her call name.

Another name I thought of was "Just Call Me Marvelous."  Because finding a name that incorporates Marge's call name is next to impossible without also including the word "Simpson," I figured that finding an adjective that started with roughly the same letters would be a good choice.  

My only issues with this name is that it has no prefix whatsoever, which looks weird to me (though I'll probably correct this), and for sounding a bit more on the joking and upbeat side.  Allow me to anthropomorphize a bit, but Marge does has a sense of humor, in my opinion.  The only problem is that people do not see that side of her, because when she's out and about, she's generally a pretty serious dog.  So, in one way, the name almost doesn't fit her.

Lastly, I would like to include some sort of prefix.  My first choice was SM, for "Silly Marge," and, honestly, also because I like the way the letters look. My first and middle initials are also SM, but that wasn't intentional on my part.  I can't really think of anything better.

Any ideas?  (SM) Northbound Fly by Night, or (SM) Just Call Me Marvelous?  I'm open to other ideas, too.. a newer name that I thought of was simply something like (SM) Midnight Marvel.  Still not sure on the prefix, which is why it's in parenthesis.

Do YOUR dogs have full names?  What are they, and how did you come to settle on them?