Cognomen Tumkur (Tumkur 
) , all around the world, is a rare surname. The cognomen Tumkur is habitual in India, where it is a very rare surname, Australia, and Canada. Measured by absolute frequency, it is the most numerous in India, the United States, and Australia. Much less frequently, Tumkur is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Tumkur | United Kingdom, Australia, United States, India, Canada |
| tumkur r. nag raj mycologist and lichenologist (b. 1929) |
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| tumkur subbarao jagannath researcher |
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| tumkur ramamohan researcher |
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| tumkur ramasetty bharathi researcher (ORCID 0000-0003-0032-741X) |
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Mr, Pavan, Pooja, Rahul, Raghu, Renee, Gopal, Gowri, Laxmi, Vinod, Vijay, Veena, Imran, Manasa, Mahesh, Mohana, Mukund, Sanjay, Sanjiv, Suresh, Sowmya, Smitha, Kiran, Kavya, Ashok, Anjan, Ms, Sit, Sri, Manu, Shiv, Sidd, Anil, Asha, Babu, Raju, Anitha, Ravi, Usha, Uday, Manju, Sagar, Sunil, Suhas, Sonia, Sneha, Anant, Anand, Hema, and Anurag