NIGER

Officially the Republic of Niger, is a landlocked sub-Saharan country in Western Africa, named after the Niger River. The capital city is Niamey.
The adjective form of Niger is Nigerien, which should not be confused with Nigerian  for Nigeria and derives from the French nigérien, -ne. There are different opinions about the adjective form however. Merriam-Webster lists Nigerois (which has, despite its sound, no equivalent form in French) only as the noun form. However, there are instances of Nigerois having been used adjectivally. CNN and other news sources often circumvent using the adjective altogether, using the noun instead, e.g. 'the Niger parliament', 'Niger leader slain' or 'Niger's capital', 'Niger's people'. The citizens of Niger use the adjective 'nigérien'.