Most of these captives were of Nilotic extraction, and were either purchased by the Tuareg nobles from slave markets in the Western Sudan or taken during raids.
Their origin is denoted via the Ahaggar Berber word Ibenheren (sing.
Others are descendants of the historical Trans-Saharan trade in peoples and/or, and after the Arab invasions of North Africa in the 7th century, descendants of slaves from the Arab Slave Trade in North Africa. Carlos Moore, resident scholar at Brazil's University of the State of Bahia, in the 21st century Afro-multiracials in the Arab world, including Arabs in North Africa, self-identify in ways that resemble multi-racials in Latin America.
He claims that black-looking Arabs, much like black-looking Latin Americans, consider themselves white because they have some distant white ancestry.
Black people is a term used in certain countries, often in socially based systems of racial classification or of ethnicity, to describe persons who are perceived to be dark-skinned compared to other given populations.