Family name Karthigesu (Karthigesu 
) , in all the world, is quite a rare surname. The cognomen Karthigesu is habitual in Sri Lanka, where it is quite a rare surname, Malaysia, and Afghanistan, where it is a rare surname. Much less frequently, Karthigesu is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Karthigesu | Canada, Malaysia, Afghanistan, Sri Lanka, Switzerland |
| karthigesu aimanan researcher |
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| s. karthigesu 25th Surveyor General of Sri Lanka from 1961 to 1965 |
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| m. karthigesu Judge, Supreme Court of Singapore (1990-1993), and Judge of Appeal (1993-1999) |
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| shantha p karthigesu researcher (ORCID 0000-0003-3100-5253) |
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