Cognomen Sadashivaiah (Sadashivaiah 
) , worldwide, is a rare family name. The surname Sadashivaiah is habitual in India, where it is a very rare surname, the United Kingdom, where it is an extremely rare surname, and the United States. More prevalently, Sadashivaiah is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sadashivaiah | United States, India, United Kingdom |
| c. p. sadashivaiah Indian freedom fighter, IN (b. 1931) |
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| vijay sadashivaiah researcher (ORCID 0000-0003-1619-4471) |
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