Cognomen লাহা (Laha 
, লাহা) , globally, is a widespread last name. The last name লাহা is characteristic of India, where it is quite a rare surname, Latvia, and Madagascar. Not in comparison with a country's population, the name is most common in India, Madagascar, and Indonesia. Much less frequently, লাহা is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Laha | Indonesia, Madagascar, United States, India, Bangladesh |
| অবতারচন্দ্র লাহা Bengali writer, BD (b. 1856) |
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| রসময় লাহা BD (b. 1869) |
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| সত্যচরণ লাহা naturalist, educationist and intellectual, IN (b. 1888) |
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| বিমলাচরণ লাহা Bengali scholar, IN (b. 1892) |
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