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Cognomen Kailayapillai (Kailayapillai
) , all over the world, is a rare family name. The cognomen Kailayapillai is characteristic of Sri Lanka, where it is quite a rare surname, Canada, where it is a very rare surname, and Netherlands. Not in comparison with a country's population, it is commonest in Sri Lanka, Canada, and the United Kingdom. Very seldom, Kailayapillai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kailayapillai | United Kingdom, United States, Sri Lanka, Netherlands, Canada |
Kailan, Abinaya, Sugirtha, Kayilaikumaran, Thayalan, Tharshana, Thirumaran, Sivayoganathan, Piratheepan, and Jeyakanthan