Last name วิโรจน์อัมพร (วิโรจน์อัมพร 
) , across the world, is a very rare surname. The family name วิโรจน์อัมพร is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| วิโรจน์อัมพร | Thailand |