Botha Brick Wall

Is there anybody who can help me. I'm looking for the parents of Anna Katharina Nel
I only know her father was known a Marthinus. Could her parents be

Johannes Marthinus Botha,
Birth 28 Dec 1874 in Somerset East
Death 11 Mar 1949 in Adelaide

And

Maria Christina Venter,
Birth 7 Jul 1885 in Cradock
Death 12 Dec 1944 in Adelaide

The reason I’m not sure is because I found reference (no source) to their daughter with the same name and dates married to Adriaan van Zyl

I've looked but can't find these profiles on Geni.