For my purposes, I have a lot of contacts who are couples or families where it's quite redundant to create separate table entries for each person. For these types of contacts it would be more useful to enter additional names all under the same address. Each however would have their own birthday and e-mail address (and probably mobile # especially in this day and age:) !). In the home page of the address book, only the first member would need to be listed, however, when searching and displaying the details of the contact it would have to then show everyone in that family.