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Cognomen Siwaluk (Siwaluk ) , all over the world, is an extremely rare surname. The family name Siwaluk is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. More frequently, Siwaluk is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Siwaluk | Thailand |
Kumpu, Kraipan, Suksawat, Khamphon, Srikrajang, Pothitapana, Chamchaiharn, and Thiraphuet