One way to handle the family groupings can be achieved in Apple's Address Book using Smart Folders.
Smart folders allow you to create auto-updating groups based on rules. Therefore you could create groups based on last name (families). If there are several families (i.e. extended family), you can add other rules to differentiate them, like State, ZIP code, or a custom tag in their 'notes' field.
Smart folders allow you to create auto-updating groups based on rules. Therefore you could create groups based on last name (families). If there are several families (i.e. extended family), you can add other rules to differentiate them, like State, ZIP code, or a custom tag in their 'notes' field.