Cognomen Jaji (Jaji 
, Judge , جاجي 
) , around the globe, is a common surname. The last name Jaji is characteristic of Guernsey, where it is quite a common surname, Ireland, and New Zealand, where it is quite a rare surname. Measured by absolute frequency, the name is most common in Nigeria, the United States, and the United Kingdom. Very seldom, Jaji is the forename as well as the last name.
| folashade sherifat jaji Nigerian chemist, NG (b. 1957) |
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| patrick jaji South African judge, ZA |
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| alhaji zubair jaji researcher (ORCID 0000-0001-9721-2920) |
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| yi jaji Goryeo diplomat |
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| amina m jaji researcher |
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| abubakar muhammad jaji politician, NG (b. 1991) |
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