Family name Sothinathan (Sothinathan 
) , all around the world, is a rare surname. The surname Sothinathan is habitual in Sri Lanka, where it is quite a rare surname, Malaysia, where it is a rare surname, and Canada, where it is a very rare surname. Measured by absolute frequency, it is the most numerous in Sri Lanka, Malaysia, and the United Kingdom. Also, Sothinathan is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Sothinathan | Sri Lanka, United Kingdom, Canada, Malaysia, United States |
| s. sothinathan Malaysian politician, MY (b. 1960) |
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| nalaiyini sothinathan Ph.D. Queen Mary, University of London 2007 |
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