One of my New York City friends and her husband received a good piece of luck several years ago, making them rather wealthy. For many years they owned a small building. One fine day a developer bought the property next to their building, upon which he wanted to build a very tall building. To build the very tall building, the developer had to buy air rights from them. Which he did. For big bucks. So my friend is now an "airess." And her husband is now an "air." They did not let their wealth go to their heads, so they are not "airheads."