South Africa—Church of the Province of South Africa, Parish Registers, 1801–2004 [Part E][M3CV-6RN] - there is a name in parentheses under the ChristianName column. Should it be indexed as part of the name?
Under General Indexing Guidelines this looks like an alias (possibly English and Native version). Instructions are indicated below. Note: I have not worked on this specific project, so you might want to wait for some others to give their opinions as well.
If alias names were included on a document, or if an individual's name was listed with various spellings on the document, include all variants, separating each with the word Or. For example, if a name was written as "Georgios (George) . . . index the name fields as follows:
Given Name: Georgios Or George