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Last name Wiangkao (Wiangkao ) , globally, is a very rare family name. The cognomen Wiangkao is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Wiangkao | Thailand |
Sala, Sajee, Sasitorn, Anchalee, and Phiraphong