Across the world, Nii (Nii 
, ニイ 
, Нии 
) is a common mostly male, but infrequently girly first name. The first name Nii is characteristic of Ghana, where it is quite a common boy's name, Mauritius, where it is quite a rare epicene name, and Algeria, where it is a rare epicene name. Measured by absolute frequency, it is the most numerous in Ghana, Algeria, and Indonesia. Much less frequently, Nii is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Nii | Egypt, Myanmar, Ghana, Indonesia, Algeria |
| ニイ | Japan |
| Нии | Armenia, Kyrgyzstan, Russia |
Nii is also a name for the fictitious and mythical characters: .
| nii kwabena bonnie iii He was a chief of Osu Alata Mantse and Oyokohene of Techiman, GH (b. 1888) |
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nii amugi ii former king of Ghana (1940-2004) (b. 1940) |
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| nii ayikai adjin–tettey Ghanaian athletics competitor, GH (b. 1930) |
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| nii tackie tawiah iii Ghanan King (Ga Mantse), GH (b. 1940) |
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nii nortey ashong footballer, GH (b. 1994) |
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| nii kwate owoo Ghanaian academic and filmmaker, GH (b. 1944) |
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| nii armah ashitey Ghanaian lawyer, politician, Member of Parliament and Government minister, GH (b. 1950) |
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| nii nortey duah Ghanaian politician, GH (b. 1953) |
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| nii ashie kotey Ghanaian judge, GH (b. 1953) |
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| nii ashitey nsotse Ghanaian musician, GH (b. 1955) |
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| nii amasah namoale Ghanaian politician, GH (b. 1958) |
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| nii oakley quaye-kumah Ghanaian politician, GH (b. 1959) |
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| nii adjei-boye sekan Ghanaian politician (1959-2006), GH (b. 1959) |
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| nii okai parbey (b. 1953) |
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| nii okwei kinka dowuona vi Ghanaian traditional leader (b. 1963) |
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Ko, Martey, Mantse, Mensah, Sackey, Ankrah, Ashong, Ayitey, Laryea, Lartey, Tackie, Tetteh, Tettey, Nortey, Allotey, Aryeetey, Amartey, Adjetey, Acquaye, Lamptey, Hammond, Quartey, Quaye, Botchway, Okine, Tagoe, Na, Ayi, Coo, Koo, Kii, Naa, Noi, Addo, Addy, Boye, Okai, Odoi, Mills, Sowah, Annan, Armah, Aryee, Abbey, Adjei, Kotey, Dodoo, Nunoo, and Thompson