evidence: The Republic of the Congo is one of the most urbanized countries in Africa, with nearly 70% of Congolese living in urban areas. The population is concentrated in the southwest of the country, mainly in the capital Brazzaville, Pointe-Noire, and along the railway line that connects the two. The tropical jungles in the north of the country are sparsely populated. Most Congolese are Bantu, and most belong to one of four main ethnic groups, the Kongo, Teke, Mbochi, and Sangha, which consist of over 70 subgroups. [...] local long form: Republique du Congo local short form: Congo former: French Congo, Middle Congo, People's Republic of the Congo, Congo/Brazzaville etymology: named for the Congo River, which makes up much of the country's eastern border; the river name derives from Kongo, a Bantu kingdom that occupied its mouth at the time of Portuguese discovery in the late 15th century and whose name stems from its people the Bakongo, meaning "hunters" [...] Disputes - international the location of the boundary in the broad Congo River with the Democratic Republic of the Congo is undefined except in the Pool Malebo/Stanley Pool area