Cognomen Lonappan (Lonappan 
) , all over the world, is quite a rare last name. The family name Lonappan is habitual in Lesotho, where it is quite a rare surname, United Arab Emirates, and Bahrain. Not in comparison with a country's population, it is commonest in India, United Arab Emirates, and Zambia. Also, Lonappan is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Lonappan | Zambia, Lesotho, Saudi Arabia, India, United Arab Emirates |
| lonappan nambadan Indian politician, IN (b. 1935) |
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anto idicherian lonappan PhD student in Astrophysics and Cosmology at SISSA, IN (b. 1992) |
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| lonappan arangassery |
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