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Cognomen Singyai (Singyai
, Seingyai
) , throughout the world, is a very rare last name. The last name Singyai is habitual in Thailand, where it is a very rare surname, Brazil, where it is an extremely rare surname, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Singyai | United States, Thailand |
| Seingyai | Brazil, Thailand |