Cognomen فضل السيد (فضل السيد 
) , worldwide, is quite a common family name. The surname فضل السيد is characteristic of Sudan, where it is quite a common surname, Saudi Arabia, where it is quite a rare surname, and Libya, where it is a rare surname. Not in comparison with a country's population, it is commonest in Sudan, Saudi Arabia, and Egypt. Much less frequently, فضل السيد is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| فضل السيد | Saudi Arabia, Libya, Sudan, Egypt |