Surname Ponniah (Ponniah 
) , worldwide, is quite a common last name. The last name Ponniah is characteristic of Malaysia, where it is quite a common surname, Sri Lanka, where it is quite a rare surname, and Singapore. Not in comparison with a country's population, the name is most common in Malaysia, Sri Lanka, and India. Much less frequently, Ponniah is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Ponniah | Australia, Malaysia, Sri Lanka, India, Canada |
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mano ponniah Sri Lankan cricketer, LK (b. 1942) |
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| rennis ponniah Singaporean bishop, SG (b. 1955) |
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| kantharoopan ponniah badminton player, MY (b. 1970) |
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| james ponniah (b. 1969) |
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| sathibalan ponniah researcher (ORCID 0000-0001-8583-4087) |
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| ponniah vajeeston researcher |
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| ponniah yogaraja British political candidate |
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| ponniah thirumalaikolundusubramanian |
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