Last name Gajan (Gajan 
, Гаян 
, Гажан ) , globally, is a common family name. The family name Gajan is habitual in Slovakia, where it is quite a rare surname, Sri Lanka, and Serbia. Not in comparison with a country's population, this name is the most popular in India, Sri Lanka, and France. Likewise, Gajan is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Gajan | Sri Lanka, India, Pakistan, France, Slovakia |
| Гаян | Kazakhstan, Armenia, Russia, Kyrgyzstan, Ukraine |
| Гажан | Kazakhstan, Russia, Ukraine |
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alfred gajan German non-fiction writer (1933-2015), DE (b. 1933) |
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| étienne gajan French athlete, FR (b. 1890) |
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| koloman gajan Czechoslovak historian, SK (b. 1918) |
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| gajan pathmanathan Sri Lankan cricketer (1954-2012), LK (b. 1954) |
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| christian gajan rugby union player, FR (b. 1957) |
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| ivan gajan Russian pianist, RU (b. 1958) |
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| hokie gajan American football player (1959-2016), US (b. 1959) |
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| gajan srikumar researcher |
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| david gajan researcher |
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| olivier gajan French film editor, FR |
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