As to "Yankee", a lonnnnnnng time ago I learned the following:

"All the world knows that a Yankee is someone from the United States.

"Everyone below the Mason-Dixon line in the United States knows that a Yankee is someone from north of the Mason-Dixon line.

"Everyone from north of the Mason-Dixon line knows that a Yankee is someone from New England.

"Everyone from New England knows that a Yankee is someone from New Hampshire.

"Everyone from New Hampshire knows that a Yankee is someone who eats pie for breakfast."

Dave Oesterreich