Globally, Mandayam (Mandayam 
) is a very rare masculine first name. The first name Mandayam is characteristic of Eastern Asia, particularly China, where it is an extremely rare male name. More frequently, Mandayam is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Mandayam | United Kingdom, Canada, China, India, United States |
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mandayam anandampillai sampathkumaran Indian academic (1882–1944), IN (b. 1882) |
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mandayam osuri tirunarayana iyengar Indian medical entomologist, IN (b. 1895) |
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| srinivasan chakravarthi mandayam Indian businessperson (born 1935, child of Parthasarathi Chakravarthi Mandayam), IN (b. 1935) |
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| mandayam kannappan srivas Ph.D. Massachusetts Institute of Technology 1982 |
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| mandayam a. srinivas Ph.D. The Pennsylvania State University 1984 |
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| mandayam thandanoor suraj Ph.D. University of Delaware 2001 |
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