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Last name Kwunjai (Kwunjai ) , in the entire world, is an extremely rare surname. The last name Kwunjai is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Predominantly, Kwunjai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kwunjai | Thailand |
Vannak, Kuntree, Paengda, Preecha, Prommin, Ngamdee, Singkorn, Chotsuwan, Kassatsuntorn, Pengpinit, Vichiansee, and Singhasiri