Family name Rajappa (Rajappa 
) , across the world, is quite a rare cognomen. The family name Rajappa is habitual in United Arab Emirates, where it is quite a rare surname, Malaysia, where it is a rare surname, and Kuwait. Not in comparison with a country's population, it is commonest in India, Malaysia, and United Arab Emirates. Predominantly, Rajappa is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Rajappa | Saudi Arabia, United Arab Emirates, Malaysia, United States, India |
| p. s. rajappa Indian landlord and politician (b. 1889) |
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| joseph rajappa Roman Catholic bishop (1918-1989) (b. 1918) |
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| rajit rajappa researcher |
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| n. r. rajappa Ph.D. |
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| suhas kodasoge rajappa researcher |
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| muthaiah rajappa researcher |
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| medha rajappa researcher |
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| deepak rajappa researcher |
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