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 | United Arab Emirates, Nepal, India, Indonesia, Sri Lanka |
| Sayana | Philippines, United Arab Emirates, India, Indonesia, Democratic Republic of the Congo |
| Saiana | Brazil, Russia, United States, India, Malaysia |
| Сайана | Russia |