Last name Koroi (Koroi 
, Корой 
) , throughout the world, is quite a rare cognomen. The family name Koroi is habitual in Fiji, where it is a common surname, New Zealand, where it is quite a rare surname, and Ukraine, where it is a rare surname. Measured by absolute frequency, it is the most numerous in Fiji, Ukraine, and Russia. Much less frequently, Koroi is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Koroi | Australia, Indonesia, Fiji, United States, New Zealand |
| Корой | Ukraine, Russia, Kazakhstan |
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sevanaia koroi Fijian rugby league footballer, FJ |
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| jokapeci koroi Fijian politician, FJ (b. 1932) |
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vilimoni koroi New Zealand rugby union footballer, NZ (b. 1998) |
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| lemeki koroi (b. 1969) |
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| jimi koroi Fijian military and police officer |
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| caleb koroi cyclist, FJ |
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| taniela koroi Fijian rugby union player (1990-), FJ (b. 1990) |
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| tevita koroi Fijian footballer, FJ (b. 1994) |
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Mr, Semi, Anna, Apek, Kara, Kele, Kesa, Kurt, Peni, Pita, Rita, Lena, Leba, Lewa, Liti, Lica, Lote, Luke, Luse, Josh, John, Jone, Sera, Sulu, Suli, Sisa, Su, Mat, Sai, Ana, Ann, Amy, Ben, Kay, Ken, Dee, Jese, Lai, Lia, Jay, Iva, Ima, Mary, Mark, Maca, Mere, Mele, Sala, Lee, and Tara