Family name Kaiva (Kaiva 
) , worldwide, is a rare surname. The surname Kaiva is habitual in Northern Europe, particularly Estonia, where it is quite a rare surname, Latvia, where it is a rare surname, and Lithuania. In absolute terms, it is the most numerous in India, Estonia, and Latvia. Also, Kaiva is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kaiva | Estonia, Papua New Guinea, Latvia, India, Lithuania |
| lūcija kaiva Latvian chess player, LV (b. 1916) |
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| hans kaiva Estonian boxer, EE (b. 1932) |
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