Across the world, ซีดี (سيد 
, Sidi 
, ซีดี 
) is a widespread predominantly boy's, but very seldom girly first name. The forename ซีดี is characteristic of Egypt, where it is a common boy's name, Iraq, and Mauritania, where it is a common primarily male, but very infrequently female name (explore the name in all countries). Not in comparison with a country's population, it is commonest in Egypt, Iraq, and Nigeria. Likewise, ซีดี is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| سيد | Iraq, Egypt, Sudan, Syria, Saudi Arabia |
| Sidi | Mali, India, Indonesia, Nigeria, Mauritania |
| ซีดี, Cdscds | Thailand |
ซีดี is also a name for the fictitious and mythical characters: Sid , the Ice Age character, Ice Age: Collision Course; Sid Jenkins , the character in Skins; Sid Phillips , the Toy Story character; Sid Hammerback , the fictional character, CSI: NY and Sid Perks , the character in BBC Radio 4 drama The Archers, among other works.