Family name Jefferis (Jefferis 
) , in all the world, is quite a rare surname. The family name Jefferis is habitual in Botswana, where it is quite a rare surname, New Zealand, and Australia, where it is a rare surname. Measured by absolute frequency, it is the most numerous in the United States, the United Kingdom, and Australia. Very seldom, Jefferis is the forename as well as the last name.
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| Jefferis | Botswana, United Kingdom, Australia, United States, Canada |
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albert w. jefferis American politician (1868-1942), US (b. 1868) |
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| james jefferis (1833-1917) Congregational minister, lecturer and journalist, AU (b. 1833) |
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frank jefferis English footballer (1884-1938), GB (b. 1884) |
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| benjamin grant jefferis physician (b. 1851) |
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| barbara jefferis Australian writer, AU (b. 1917) |
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marea wood jefferis American poet, US |
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joshua jefferis Australian artistic gymnast, AU (b. 1985) |
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| sibylle anna bierhals jefferis (b. 1941) |
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| donna jefferis costume designer in New Zealand |
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| william jefferis Bristol slave trader (fl. 1713–1747) |
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| j. jefferis researcher ORCID ID = 0000-0003-3362-8139 |
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| charles jefferis British Royal Navy officer, lieutenant in 1809 |
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| leland jefferis Ph.D. University of Wisconsin-Madison 2014 |
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| joseph jefferis Bristol slave trader (fl. 1717–1734) |
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| joanna jefferis researcher |
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