I know of an Emmi, which is not a nn. Since you abhor
Emma and
Emily, I can't see you using as
Emmy or Emmylou as nn's for anything. So in your case, I can't see why Emmylou as a formal name is a bad thing. :b I personally couldn't get past the backwoods/hick association, but it's still a hell of a lot better than McKynzie or somesuch.
~
Heather~
"Why is it that, as a culture, we are more comfortable seeing two men holding guns than holding hands?" -
Ernest Gaines