Surname Roustaei (Roustaei 
) , in all the world, is a rare last name. The cognomen Roustaei is characteristic of Iran, where it is a rare surname, Sweden, and Malaysia, where it is a very rare surname.
| VARIANT | COUNTRY |
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| Roustaei | Iran, France, United States, Malaysia, Sweden |
| mostafa roustaei Iranian amateur astronomer and retired fighter pilot (b. 1951) |
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| narges roustaei researcher |
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| zahra roustaei researcher |
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| kourosh roustaei |
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Ali, Mehran, Afshin, Pourya, Touraj, Hassan, Hessam, Marzieh, Mansour, Mahkaam, Mohamad, Mostafa, Mojtaba, Mehrdad, Shahram, Sepideh, Soheila, Alireza, Ali-Reza, Dariush, Nayereh, Noushaz, Mohsen, Masoud, Mahnaz, Hamid, Mina, Alex, Amir, Amin, Reza, Neda, Iman, Omid, Majid, Mehdi, Hossein, Milad, Akbar, Ahmad, Bijan, Ramin, Rahim, Roham, Leila, Javad, Nahid, Ehsan, Saeed, and Fatemeh