Last name سيدنا (سيدنا 
, Sidna 
) , in all the world, is quite a rare family name. The cognomen سيدنا is characteristic of Mauritania, where it is quite a rare surname, Sudan, and Egypt, where it is a rare surname. Measured by absolute frequency, the name is most common in Sudan, Egypt, and Iran. Likewise, سيدنا is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| سيدنا | Egypt, Iran, Sudan, Iraq, Saudi Arabia |
| Sidna | Mauritania, Brazil |