Surname Olliff (Olliff 
) , in the entire world, is a rare cognomen. The surname Olliff is habitual in New Zealand, where it is quite a rare surname, Australia, where it is a rare surname, and the United States. In absolute terms, it is commonest in the United States, the United Kingdom, and Australia.
| VARIANT | COUNTRY |
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| Olliff | United Kingdom, Canada, Australia, New Zealand, United States |
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arthur sidney olliff Australian entomologist, naturalist, mycologist, botanist, GB (b. 1865) |
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caleb olliff New Zealand cricketer (1883-1961), NZ (b. 1883) |
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john olliff English tennis player and sports journalist, GB (b. 1908) |
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| nigel hugh olliff (born 1950), GB (b. 1950) |
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| hugh olliff author, GB (b. 1957) |
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| dominic anthony olliff (born 1978) (b. 1978) |
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| laurie olliff New Zealand rugby league footballer, NZ |
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| kimberley joanna olliff (born 1981) (b. 1981) |
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| martin t. olliff |
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| francesca elizabeth olliff (born 1992) (b. 1992) |
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