I know 8 years is a long time but I think this might help.
My great Grandfather is Dirk Petrus Varqualyn Wiese (b. 1903) and some of his children that I know of are Johannes Benjamin, Dirk Petrus, Hester Jacoba and also a daughter named Bettie. All of them have been born in the Cape Province in South Africa.
I have also worked with a gentlemen born somewhere in the 1940's by the name Wynand Jacobus Frederik Wiese which is also a family name.
Does anybody know how Kobus Wiese the rugby player and Christo Wiese the Finance Tycoon are related?