South African whites were themselves once labeled as separate races

Evidence

The South African Institute of Race Relations was founded in 1929, at a time when Afrikaans-speaking and English-speaking whites were often referred to as races, but it concerned itself primarily with black—white relations. — David Theo Goldberg, John Solomos, A Companion to Racial and Ethnic Studies, 655

Categorization

• CANDY: Surprising that English- and Afrikaans-speaking whites were once called distinct races — a sharp little fact.
• XREF: connects to: South African racial categories shifted with expediency despite extreme racism — Charles Tilly, Regimes and Repertoires, 564