Surname Harrah (Harrah 
) , across the world, is quite a rare cognomen. The family name Harrah is characteristic of Mauritius, where it is quite a rare surname, Israel, where it is a rare surname, and the United States. Much less frequently, Harrah is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Harrah | Mauritius, Israel, Canada, Philippines, United States |
| ezra clarence harrah U.S. biologist (b. 1889) |
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toby harrah American baseball player and coach, US (b. 1948) |
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| william f. harrah American businessman (1911-1978), US (b. 1911) |
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| verna harrah American film producer, US (b. 1944) |
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| dennis harrah American football player, US (b. 1953) |
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| herb harrah college basketball player (1953–1956) Louisville |
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| james harrah |
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| mark harrah |
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| richard harrah |
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