Last name Njai (Njai 
) , all around the world, is quite a rare family name. The cognomen Njai is characteristic of Sub-Saharan Africa, particularly Gambia, where it is quite a common surname, Kenya, where it is quite a rare surname, and Sierra Leone. In absolute terms, this name is the most popular in Sub-Saharan Africa, particularly Gambia, Kenya, and Tanzania. Very seldom, Njai is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Njai | Tanzania, Gambia, Kenya, Sierra Leone, United States |
| fatoumatta njai Gambian politician, GM (b. 1950) |
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| njai darboe Gambian politician, GM (b. 1950) |
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| abdoulie njai politician from Gambia, GM |
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Mr, Hope, Fatu, Omar, Yama, Maria, Marie, Manga, Maila, Mahdi, Harr, Modou, Salif, Sarah, Samba, Sammy, Saiba, Siray, Sidia, Sukai, Sulay, Mercy, Sohna, Ebou, Tony, Ms, Ya, Sam, Amo, Awa, Nel, Ida, Mary, Musa, Ndey, Myla, Soma, Ansu, Amie, Amma, Baba, Kura, Rose, Gien, Lucy, Sidi, and Alieu