The most evident linguistic connections between African and Dravidian languages is in place-names:

Africa India

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Botswana, Bophutatswana (reg) Gondwana (region)

Ubangi (river) Bhangi (caste)

Gonder (town, reg.) Gond (tribe)

Galla (tribe) Goala (caste), Gaya (town)

Kongo (river, reg., tribe) Kongu Nadu (reg.), Kond or Khond (tribe)

Imbangala (tribe) Bangala or Bengal (tribe, reg.)

The `Congo' river and the `Kongo' tribes are cognate to the Kongu Nadu comprising the Salem tract in Tamil Nadu prior to its conquest by the Cholas [ EB 10 salem 350 ].
The suffix `-wana' is common to Bantu and Dravidian languages, thus Botswana and Bophuthatswana in southern Africa [ EB 2 botswana 412 ] [ EB 2 boph. 376 ] and Gondwana in central India [ EB 5:358 ].
The Mbangala or Imbangala warrior tribe of central Angola [ EB 6: imb. 266 ] are cognate to the Bangala tribe and the region named after them in eastern India, which later became Bengal.
The Ubangi river [ EB ubangi 12:98 ] is the largest right-bank tributary of the Congo river and flows past Bangui town (the capital of the Central African Republic). A black tribe (and later low caste) by the name of Bhangi exists in northern India. The Bangweulu is a large lake and swamp region in northeastern Zambia. In Bantu the term denotes `Large Water' [ EB 1 bangw. 868 ]
The Galla are the largest ethnic group in Ethipia, forming 40 % of the population [ EB 5 galla 87 ]. They are cattle-herders, as are the black-skinned low-caste known as Goala (cow-herders) in central India.
The Mbundu are the second-largest ethnic group of Angola [ EB 7 mbundu 986 ] while the Munda are in Eastern India.
The Ndongo tribe of the Mbundu [ EB 7 mbundu 986 ] are perhaps cognate to the Dombas or Doms of India.
The Godabas of Somalia may have given their name to the Godavari River in the Deccan.
Congates of `gond' and `gong' are widepread in Africa and Dravidia. Gonder or Gondar is the ancient capital of Ethiopia 1652-1855 as well as the surrounding region. The Gongola river is the primary tributary of the Benue River, while the Gongola basin is in northeastern Nigeria [ EB 5 gongola 359 ]. The Guang or Gonja in northern Ghana, who are descendant of Mandingos, speak the Gur and Goja languages and founded the Gonja kingdom [ EB 5 guang 532 ] The Gond are a large group of Draviidan tribes in Central India.

The Congolese linguist Th. Obenga proposed the term `Indo-African' languages in analogy with `Indo-European' [ Obenga ]. Prof. L. Homburger established close linguistic connections between Dravidian and Senegalese languages especially Fulani, as well as Kannada - Bantu and Telugu - Mande relationships [ Hom ]. Prof. Tuttle established connections between Nubian and Dravidian languages [ Tuttle ]. Prof. Lahoverty established conections between African and Dravidian languages [ Lah ]. Senegalese and Dravidian languages are closely related grammatically, structurally and lexically [ N'D ] [ Ups ]. The Upper Nile basin is considered by some scholars to be the original home of the Dravidians on linguistic grounds [ Win.gen 1118 ]

Dravidian legends mention an ancient landmass which disappeared into the Ocean. The Tamils say that it was highly populated and included large cities, now buried beneath the sea. Tamil historians have discussed this land mass in detail throughout history; eg. Ariyarkkunallar in the 12th century. Linguistic evidence indicates that the Dravidians are related to the C-group Nubians of the Western Sahara who built the Kerma empire. Since Egypt was often at war with Kerma, the connection across Lemuria seems more plausible. [Winters:Agri]