They inhabit South Sudan and the Gambela Region of Ethiopia, while also being a large minority in Kenya, Uganda, the north eastern border area of Democratic Republic of the Congo, and Tanzania.
[12] Some of the earliest archaeological findings on record, that describe a similar culture to this from the same region, are found at Kadero, 48 m north of Khartoum in Sudan and date to 3000 BC.
[19] These studies suggest that populations closely related to Nilotic people long inhabited the Nile Valley as far as southern Egypt in antiquity.
[22][23] As aridity increased during the fourth millennium BCE, the importance of cattle in the economic and social life of the region grew, leading to the emergence of distinct cultural practices, including the adoption of pottery styles characterized by incised herringbone patterns.
The evidence of cattle burials and the presence of pottery designs reflect a synthesis of local traditions and influences from neighboring cultures, highlighting the dynamic relationships that existed during this period of transformation and trade.
Some of these later migrations coincided with the collapse of the Christian Nubian kingdoms of Makuria and Alodia and the penetration of Arab traders into central Sudan.
There they established an economy based on cattle raising, cereal farming, and fishing, with small villages located along the length of the river.
Cøllø traditions tell of Rädh Odak Ocollo who ruled around 1630 and led them in a three-decade war with Sennar over control of the White Nile trade routes.
The same period had the gradual collapse of the Funj sultanate, leaving the Cøllø in complete control of the White Nile and its trade routes.
The significance of tracing individual clan histories in order to get an idea of Kalenjin groups formation has been shown by scholars such as B.E.
He argued that the Tugen first settled in small clan groups, fleeing from war, famine, and disease, and that they arrived from western, eastern, and northern sections.
[33] Apparently, spatial core areas existed to which people moved and concentrated over the centuries, and in the process evolved into the individual Kalenjin communities known today by adopting migrants and assimilating original inhabitants.
[34] For various reasons, slow and multigenerational migrations of Nilotic Luo peoples occurred from South Sudan into Uganda and western Kenya from at least 1000 AD, and continuing until the early 20th century.
The Kipsigis and Nandi are said to have lived as a united group for a long time but eventually were forced to separate due to antagonistic environmental factors.
[40]Geographical barriers protected the southerners from Islam's advance, enabling them to retain their social and cultural heritage and their political and religious institutions.
The Shilluk, Azande, and Bari people had more regular conflicts with neighbouring states[41] Most Nilotes continue to practice pastoralism, migrating on a seasonal basis with their herds of livestock.
[42] Through lengthy interaction with neighbouring peoples, the Nilotes in East Africa have adopted many customs and practices from Southern Cushitic groups.
A Y-chromosome study by Wood et al. (2005) tested various populations in Africa for paternal lineages, including 26 Maasai and 9 Luo from Kenya, and 9 Alur from the Democratic Republic of Congo.
The signature Nilotic A and B clades were the most common paternal lineages amongst the Nilo-Saharan speakers, except those inhabiting western Sudan.
Solomon Balemi (2018) Genetic Study of LCT- Enhancer, Y chromosome and Mitochondrial DNA Variation in Some Ethnic Groups in Ethiopia.
An mtDNA study examined the maternal ancestry of various Nilotic populations in Kenya, with Turkana, Samburu, Maasai, and Luo individuals sampled.
The authors also found that certain Nilotic populations in the eastern Great Lakes region, such as the Maasai, showed some additional Afro-Asiatic affinities due to repeated assimilation of Cushitic-speaking peoples over the past 5000 or so years.
[53] Overall, Nilotic people and other Nilo-Saharan groups are closely related to Afro-Asiatic speakers of North and East Africa.
Nilotic people and other Nilo-Saharan groups are also closely related to Niger-Congo speakers of West and Central Africa.
[54] Most Nilotic peoples have predominant to exclusive West/East African ancestry, although some groups display varying degrees of West-Eurasian admixture, mostly mediated indirectly through pastoralists from the Horn of Africa.
In East Africa, all population groups examined had elements of Nilotic, Cushitic and Bantu ancestry amongst others to varying degrees.
[7] Physically, Nilotes are noted for their typically very dark skin color and slender, and occasionally tall bodies.
In terms of facial features, the nasal profile most common amongst Nilotic populations is broad, with characteristically high index values ranging from 86.9 to 92.0.
Lower nasal indices are often found amongst Nilotes who inhabit the more southerly Great Lakes region, such as the Maasai, which is attributed to genetic differences.
[63] For 404 elite Kenyan distance runners, 76% of the international-class respondents identified as part of the Kalenjin ethnic group and 79% spoke a Nilotic language.