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Cognomen Roobyai (Roobyai ) , in all the world, is a rare last name. The surname Roobyai is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Roobyai | Thailand |
Amnuay, Pamorn, Sarinya, Supakin, Vinaijan, Thanyakan, Thayaporn, Nattapawee, Chananrath, and Yutthapong