Family name Piroj (Piroj 
) , in the world, is a rare cognomen. The family name Piroj is characteristic of Croatia, where it is a rare surname, Thailand, where it is a very rare surname, and India. More prevalently, Piroj is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Piroj | Croatia, Thailand, India, Canada, United States |
Ali, Chouywong, Prising, Elchidana, Yanalert, Sudtibanyad, Anakakul, Chotilersak, Chumouan, Boriboon, Bhandare, Rukkapan, Homchoumy, Yenlamom, Piboolnuruk, Plodprong, Saengpoowong, Aungkavattana, Padungsiripanich, Jangchudjai, Sanguandeekul, Suwannasrisuk, Deeaim, Pathan, Kumari, Kanwar, Kan, Ram, Din, Shah, Shek, Alam, Banu, Bano, Khan, Devi, Chaimongkol, Vati, Singh, Ahmad, Begam, Patan, Patel, Pasha, Srirod, Ansari, Ahamad, Bhasha, Shaik, and Lertpanyapornskul