Surname Сайана (Sajana 
, Sayana 
, Saiana 
) , in the entire world, is quite a rare last name. The cognomen Сайана is characteristic of Botswana, where it is quite a rare surname, Laos, and Kuwait, where it is a rare surname. Measured by absolute frequency, this name is the most popular in India, Philippines, and Indonesia. More prevalently, Сайана is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sajana | Indonesia, United Arab Emirates, Sri Lanka, Nepal, India |
| Sayana | Indonesia, United Arab Emirates, Philippines, India, Democratic Republic of the Congo |
| Saiana | Russia, Malaysia, United States, India, Brazil |
| Сайана | Russia |