Last name Sinnayah (Sinnayah 
) , across the world, is a rare cognomen. The cognomen Sinnayah is habitual in Malaysia, where it is a rare surname, Singapore, and Australia, where it is a very rare surname. Very seldom, Sinnayah is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Sinnayah | Australia, Singapore, Malaysia |
| sinnayah karuppiah jarabalan Malaysian sprinter (b. 1937) |
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| sinnayah sabapathy Malaysian sprinter, MY (b. 1947) |
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| puspha sinnayah researcher |
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Mr, Parameswary, Sukanthinie, Vedanandan, Jeevan Raj, Thansekaran, Kumaresan, Balagopal, Sugumaran, Thaniis Raj, Anbalagi, Samantha, Munimuruga, Michelle, Balakrishnan, Velamah, Ganasan, Annappa, Others, Nalaya, Dinesh, Ramesh, Puspha, Jodhi, Pathi, Annie, Sacha, Raja, Puan, Ganasen, and Muraleetharan