It seems as if this lady was my maternal grandmother's GGgrandfather (Christiaan Ludolph Neethling 27.8.1888-13.2.1855)'s first wife. They were married on 3.12.1814 in Stellenbosch. She passed away on 23.9.1815 during the birth of their first child. The daughter survived and grew up as half-sister to CLN's children he had with his second wife Maria Elizabeth Bosman, whom he married May 1816.
This is according to records handed down to me from my grandmother's brother, Johannes Ludwig Neethling Hansmann (11.11.1906-2.1.2002)
If you need more information, pls feel free to contact me.
Warm regards
Tania Lenore de Wet