Cognomen سيلدا (Selda 
, Sylda 
, سيلدا 
) , throughout the world, is quite a rare family name. The surname سيلدا is habitual in North Macedonia, where it is quite a rare surname, Philippines, and Albania. Measured by absolute frequency, it is the most numerous in Philippines, Indonesia, and North Macedonia. More frequently, سيلدا is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Selda | Germany, Democratic Republic of the Congo, Philippines, Turkey, Brazil |
| Sylda | Democratic Republic of the Congo, Philippines, India, United States, Brazil |
| سيلدا | Syria, Turkey, Iraq |