Surname Ilango (Ilango 
) , in all the world, is quite a rare cognomen. The family name Ilango is characteristic of Sri Lanka, where it is quite a rare surname, Bahrain, where it is a rare surname, and Qatar. Not in comparison with a country's population, the name is most common in India, the Democratic Republic of the Congo, and Sri Lanka. Also, Ilango is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Ilango | United States, India, Democratic Republic of the Congo, Sri Lanka, Malaysia |
| a. v. ilango Indian painter, IN (b. 1950) |
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| m. ilango Indian politician (b. 1955) |
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| sakkanan ilango researcher |
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| samhita m ilango researcher |
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| kandan ilango Entomologist |
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