Last name Сайдар (Saidar 
, Saydar 
, Сайдар 
) , around the world, is quite a rare cognomen. The surname Сайдар is habitual in Turkey, where it is a rare surname, Saudi Arabia, and Morocco. Measured by absolute frequency, it most frequently occurs in India, Indonesia, and Turkey. More prevalently, Сайдар is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Saidar | Indonesia, Saudi Arabia, Morocco, Philippines, India |
| Saydar | Turkey, Germany, Philippines, United States, India |
| Сайдар | Kyrgyzstan, Kazakhstan, Russia, Ukraine |