Family name Rajdai (Rajdai 
) , globally, is an extremely rare surname. The cognomen Rajdai is habitual in Venezuela, where it is an extremely rare surname, Canada, and the United States. Much more prevalently, Rajdai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rajdai | Trinidad and Tobago, India, Canada, South Africa, United States |
Munn, Rivera, Deoraj, Narine, Hemraj, Hosein, Motielal, Mukhram, Simmons, Bacchus, Kumprey, Kusiall, Persaud, Ramdass, Ramdeen, Ramoutar, Ramdihal, Jadunath, Jiwanand, Nanpatee, Hardowar, Ramprasad, Kistoo, Basant, Baldeo, Suedas, Shaw, Alli, Bali, Khan, Devi, Udai, Misir, Singh, Baiju, Baksh, Ramnarain, Pragg, Rupna, Danny, Doman, Jamon, Neils, Nunez, Outar, Oudal, Saroop, Sukhai, Puran, and Rattansingh