Cognomen Cassiem (Cassiem 
) , around the globe, is quite a rare last name. The last name Cassiem is habitual in South Africa, where it is quite a rare surname, Netherlands, where it is a very rare surname, and the United Kingdom, where it is an extremely rare surname. Not in comparison with a country's population, the name is most common in South Africa, the United Kingdom, and the United States. Much less frequently, Cassiem is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Cassiem | United States, South Africa, United Kingdom, Netherlands |
| wagheda cassiem researcher (ORCID 0000-0002-9980-0336) |
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| uzair cassiem South African rugby union footballer, ZA (b. 1990) |
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| junaid cassiem South African cricketer, ZA (b. 1993) |
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| dayaan cassiem South African field hockey player (b. 1998) |
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| mustaphaa cassiem South African field hockey player, ZA |
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