Cognomen Jaag (Jaha 
, Jaag 
) , around the globe, is a widespread last name. The surname Jaag is characteristic of Kosovo, where it is quite a common surname, Albania, where it is quite a rare surname, and India. Not in comparison with a country's population, it is commonest in India, Tanzania, and Pakistan. Very seldom, Jaag is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Jaha | Pakistan, Tanzania, Saudi Arabia, India, Kosovo |
| Jaag | Germany, Pakistan, Switzerland, United States, India |
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otto jaag Swiss biologist and botanist (1900-1978), CH (b. 1900) |
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| ingeborg jaag DE (b. 1942) |
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| tobias jaag CH (b. 1947) |
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| hannah m jaag researcher |
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| o. jaag Ph.D. |
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| christian jaag (b. 1976) |
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