Cognomen Clasby (Clasby 
) , across the world, is a rare surname. The cognomen Clasby is habitual in Malta, where it is quite a rare surname, Ireland, where it is a rare surname, and New Zealand. Not in comparison with a country's population, the name is most common in the United States, the United Kingdom, and Australia.
| VARIANT | COUNTRY |
|---|---|
| Clasby | United Kingdom, Australia, Ireland, United States, Canada |
|
john clasby Australian politician, AU (b. 1891) |
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| nancy tenfelde clasby (b. 1938) |
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| daniel clasby American artist, US (b. 1950) |
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| bob clasby American football player, US (b. 1960) |
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| betony clasby researcher (ORCID 0000-0001-7104-4308) |
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| silje clasby Norwegian association football player |
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