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Cognomen Pianroj (Pianroj ) , globally, is a rare family name. The last name Pianroj is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Pianroj | Thailand |
Aticha, Kewalin, Akarawin, Thanagon, Thanagit, Nontipak, Poomrapee, Phoomrapee, and Yutthapong