Version: (using KDE 4.3.2) OS: Linux Installed from: Debian testing/unstable Packages There is no field for family name prepositions in kaddressbook. In Dutch and German it is quite common to have these prepositions, so I think there should be such a field. It also allows to sort on the last name and not on the preposition.
Thank you for your efforts you put into this bug. kab3 has long been deprecated, and so I close its old reports. If this bug/wish is still valid for kab3's successor kaddressbook in any recent version (5.0 or later, as part of KDE Applications 15.08.0 or later), please file a new bug against kaddressbook.