It appears to me the real conflict is the mother of
Hercules Rudolph de Wet, b1c2d3e4f3
either Maria Catharina Botha, b1c7d9e4 -- or -- Anna Cecilia du Plessis
That's true Dan Cornett With the naming paterns as it is in South Africa though there could easily be two people with the name Hercules Rudolph de Wet. So I think we need to look at both.
I've uploaded the death notice for Hercules Rudolph de Wet, b1c2d3e4f3, parents issue solved.
There's still a problem in this family though, I have found the death notices for 6 Jacobus Albertus de Wet and at first glance 2 different ones were married to Maria Catharina Botha, b1c7d9e4 and Anna Cecilia du Plessis.
I may need some help to undo more merges as I add these source documents.