I will be travelling to Adelaide in a couple of weeks (I live in Melbourne which is 720kms from Adelaide) and will ask my mother for accurate details of her parents and my father's parents. My father (Gysbertus) passed away in 1997 aged 76 years. His birthdate was 16 May 1920 and he died on 16 August 1997. His parents had 11 children and I will try to get all the names I can, dates, etc. and names of my mother's parents and siblings (she came from a family of 9 children!). There are so many relations I can't believe it!!
Will be in contact when I have information for you.