Cognomen Ranken (Ranken 
, 兰肯) , in the entire world, is a rare family name. The cognomen Ranken is habitual in Mongolia, where it is quite a rare surname, Australia, where it is a rare surname, and New Zealand. In absolute terms, it most frequently occurs in the United States, Mongolia, and Australia. Much less frequently, Ranken is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Ranken | Indonesia, United Kingdom, Australia, United States, Mongolia |
| janet ranken (1755-1831) (b. 1755) |
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| alexander ranken Church of Scotland minister and author (b. 1755) |
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| sarah anne ranken wife of William Daniel Conybeare (b. 1791) |
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| george ranken (1793-1860) farmer and pastoralist (b. 1793) |
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| arthur ranken Scottish clergyman, GB (b. 1806) |
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| george ranken Scottish-Australian surveyor and writer (1827-1895) (b. 1827) |
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janette ranken thesiger d.1970 (b. 1877) |
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| charles ranken British chess player (1828-1905), GB (b. 1828) |
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| george ranken British Royal Engineer and author (1828-1856) (b. 1828) |
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| william boswell ranken (b. 1819) |
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william bruce ellis ranken Scottish painter, GB (b. 1881) |
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harry sherwood ranken Recipient of the Victoria Cross (1883-1914), GB (b. 1883) |
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| robert ranken Scottish cricketer (1840-1902), GB (b. 1840) |
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| fanny sarah ranken (b. 1838) |
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| ted ranken sport shooter, GB (b. 1875) |
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