Source : Free On-Line Dictionary of Computing

Bloggs Family, the
     
        An imaginary family consisting of Fred and Mary Bloggs and
        their children.  Used as a standard example in knowledge
        representation to show the difference between extensional and
        intensional objects.  For example, every occurrence of "Fred
        Bloggs" is the same unique person, whereas occurrences of
        "person" may refer to different people.  Members of the Bloggs
        family have been known to pop up in bizarre places such as the
        DEC Telephone Directory.  Compare {Mbogo, Dr. Fred}.