Cognomen Exelby (Exelby 
) , worldwide, is a rare surname. The family name Exelby is habitual in Australia, where it is a rare surname, the United Kingdom, and Canada. Not in comparison with a country's population, it is the most numerous in the United Kingdom, the United States, and Australia. Very seldom, Exelby is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Exelby | Canada, United Kingdom, United States, South Africa, Australia |
| leon exelby American-football player, US (b. 1888) |
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| evan exelby New Zealand lawn bowls competitor (1905-1981), NZ (b. 1905) |
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garnet exelby Canadian ice hockey player, CA (b. 1981) |
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| clare exelby Canadian football player, CA (b. 1938) |
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| john exelby British television executive (b. 1940) |
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| marion exelby Australian fencer, AU (b. 1951) |
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| randy exelby Canadian ice hockey player, CA (b. 1965) |
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| katherine exelby researcher |
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| natasha exelby Australian journalist, AU |
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| steven c exelby researcher |
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