Hi, I don't know how far you have got with Anna Maria Johanna Fourie, but there is plenty of info on her line on thei net. She was born 31st May 1889 in Brandfort in the Orange Free State. Her father was Coenraad Fredrick Fourie and her mother Anna Catherina Marx. This was one of the Vootrekker families who left Graaf Reniet in the Eastern Cape to trek north to escape the rule of the British.
The line began with the immigrant brothers Petrus and David, sons of Louis Fourie and Anna Jordaan, who came to the Cape. They each have their own well documented lines.
My grandmother was also of this line. Also a Fourie, her second name was also Johanna. I was brought up in East London, South Africa.
I have more on this family but there will be plenty if you put her family into Wiki.
Good luck. Lyn.