You're being much too "hyper" in this case. The letters AIR just happen to be part of the name McNair and have absolutely no connection to the conceptual meaning of the word "air." Now if you had something like AIRPORT and FRESH AIR in the same puzzle, then you might have a reason to be concerned. However, even then it would depend on the particular editor. If you look at many New York Times puzzles you'll see that Will Shortz does not seem to be all that bothered by similar entries in the same puzzle, as long as it's a well constructed crossword.