These are also great great grandparents of mine. They came from Osterwieck with at least some of their chidren, settled first in Klemzig near Adelaide in South Australia, then moved to the district known as the Tatiara in south east South Australia. Their graves are inBordertown, the main town in this district. The records I have go like this: Friedrich Wilhelm Wiese (born 10 Sept 1799 died 27 July 1892) m. Johanne Helene Kaufung (b. 12 March 1805 d. 21 May 1886) Children were: Friedrich Hannah August Gottfried Friedrich (married Maria Steer) Gottfried Friedrich Heinrich - he is my great gandfather - (b. 20 May 1843 d. 9 Feb 1912) m. Emily Adamson Carl Heinrich Carl Heinrich Wilhelm
Gottfried and Emily Wiese had 7 children, Amy, Emma, Fred, Robert (my grandfather), Henry, Una and Gertrude
I have more details coming down the Gottfried line, not so much on the other children.
I do not know of anyone who has found relatives in Germany but would be interested if you know of any. Wiese is a fairly common name there. Also would be happy to translate anything you have that is in German.