Last name Mahajani (Mahajani 
) , around the world, is quite a rare surname. The family name Mahajani is characteristic of India, where it is a rare surname, Denmark, where it is a very rare surname, and Indonesia. Not in comparison with a country's population, it is the most numerous in India, Indonesia, and the United States. More prevalently, Mahajani is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Mahajani | Australia, United States, India, United Kingdom, Indonesia |
| vishnu moreshwar mahajani Indian writer (b. 1851) |
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gashmeer mahajani Indian film actor, choreographer, and play director, IN (b. 1985) |
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| ramola shripad mahajani Indian businessperson (born 1947, child of Sheshrao Krishnarao Wankhede), IN (b. 1947) |
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| ravindra mahajani Indian actor, IN (b. 1949) |
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| sameehan mahajani researcher |
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