I Said: "Sorry, but this is not true. A prime example is boxer George Foreman, All five of his sons are called George, and all live at the same address." I forgot to add that the main problem with using address as part of a unique identifier for a person is that it is not, in fact, unique! How many of us have lived at the same address our whole lives? Which one are you, the George Foreman that lives at 123 Boxing Lane, or the one that lives at 456 Muhammed Ali Blvd.? Oh, you are both the same person, well I've got you in the system here twice. Numbers are used to uniquely identify an individual because there simply is no real world adjective that is absolutely unique. I predict that at some time in the future all babies will be tagged at birth with their own "ID Code". I'm not happy about the prospect, but I believe it will happen. CIAO - Martin.