Anglo-Africans are primarily White African

White African

White Africans are people of European descent living in Africa, who identify themselves as White....

 people of largely British descent

British people

The British are citizens of the United Kingdom, of the Isle of Man, any of the Channel Islands, or of any of the British overseas territories, and their descendants...

 who live or come from Sub-Saharan Africa

Sub-Saharan Africa

Sub-Saharan Africa as a geographical term refers to the area of the African continent which lies south of the Sahara. A political definition of Sub-Saharan Africa, instead, covers all African countries which are fully or partially located south of the Sahara...

 and are Anglophone

English language

English is a West Germanic language that arose in the Anglo-Saxon kingdoms of England and spread into what was to become south-east Scotland under the influence of the Anglian medieval kingdom of Northumbria...

. A large majority live in South Africa

South Africa

The Republic of South Africa is a country in southern Africa. Located at the southern tip of Africa, it is divided into nine provinces, with of coastline on the Atlantic and Indian oceans...

. Along with Afrikaners, Anglo-Africans are officially grouped as White South Africans, comprising 39% of the total White South African demographic.
Ethnicity is a politically loaded topic in South Africa. While some English speakers refer to themselves as "British", the phrase Anglo African is more generally used to refer to English speakers in Africa, particularly Sub-Saharan Africa.