The hunter–gatherer and pastoralist populations of southern Africa are among the culturally, linguistically, and genetically most diverse human populations. However, little is known about their history. We show that all of these populations have some ancestry most closely related to Europeans and Middle Easterners and use this to reconstruct the history of population movements between Eurasia, eastern Africa, and southern Africa.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3932865/#