Last name Ollis (Ollis 
) , in the world, is quite a rare surname. The family name Ollis is habitual in Estonia, where it is quite a rare surname, the United States, where it is a rare surname, and the United Kingdom. In absolute terms, it is commonest in the United States, the United Kingdom, and Australia. Much less frequently, Ollis is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Ollis | Australia, China, Canada, United States, United Kingdom |
| john ollis American politician, US (b. 1839) |
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| william ollis English footballer (1871-1940), GB (b. 1871) |
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bernard ollis Australian art educator, AU (b. 1951) |
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ian ollis Member of the National Assembly of South Africa, ZA (b. 1970) |
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| william david ollis 22 December 1924 - 13 June 1999 (b. 1924) |
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| ülo ollis (b. 1916) |
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michael ollis US (b. 1988) |
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| david f. ollis (b. 1941) |
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| terry ollis British drummer, GB (b. 1952) |
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| richard ollis English cricketer (born 1961), GB (b. 1961) |
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| bernie ollis (b. 1951) |
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| matthew anthony ollis Ph.D. University of London 2003 |
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| jenifer ollis researcher (ORCID 0000-0002-2252-3406) |
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| lucie ollis researcher (ORCID 0000-0002-8774-7865) |
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