maybe is Kukacz, Kukascz, Kukasch or Kukatsch the same family with a different writing. Took a look in the German online phonebook and found for Kukasch 23 entries and for Kukatsch 18 entries. This ie really not much. For the writings Kukacz or Kukascz are no entries. Maybe we will find out that there is one family, because your Kukasch and my Kukatsch lived both nearby Kolo.