Namibia
noun: Namibian(s)
adjective: Namibian

Nauru
noun: Nauruan(s)
adjective: Nauruan

Nepal
noun: Nepalese (singular and plural)
adjective: Nepalese

Netherlands
noun: Dutchman(men), Dutchwoman(women)
adjective: Dutch

Netherlands Antilles
noun: Dutch Antillean(s)
adjective: Dutch Antillean

New Caledonia
noun: New Caledonian(s)
adjective: New Caledonian

New Zealand
noun: New Zealander(s)
adjective: New Zealand

Nicaragua
noun: Nicaraguan(s)
adjective: Nicaraguan

Niger
noun: Nigerien(s)
adjective: Nigerien

Nigeria
noun: Nigerian(s)
adjective: Nigerian