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Last name Klansai (Klansai ) , all around the world, is a very rare surname. The cognomen Klansai is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Klansai | Thailand |
Veera, Kasuda, Unnada, Kansuda, Kriangkrai, Phattravadee, and Pattravadee