Surname Cassey (Cassey 
) , all over the world, is quite a rare family name. The last name Cassey is habitual in Kenya, where it is a rare surname, New Zealand, and Australia. Measured by absolute frequency, it is the most numerous in the United States, Kenya, and the United Kingdom. More prevalently, Cassey is the forename as well as the last name.
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| Cassey | Philippines, United States, United Kingdom, Indonesia, Kenya |
| joseph cassey businessman and activist, US (b. 1789) |
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| amy matilda cassey American abolitionist (1809-1856), US (b. 1809) |
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| phillip cassey researcher ORCID ID = 0000-0002-2626-0172 (b. 1950) |
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| cassey eggelton Cook Islands politician, NZ (b. 1952) |
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| william cassey Peerage person ID=699318 |
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| phillip cassey biologist |
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| cassey muir researcher |
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| andrew cassey Ph.D. University of Minnesota-Minneapolis 2008 |
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