Cognomen سيسيليا (Cecilia 
, Sicilia , سيسيليا 
) , in all the world, is a widespread last name. The family name سيسيليا is characteristic of Latin America and the Caribbean, particularly Mexico, where it is a common surname, Uruguay, where it is quite a common surname, and Curacao (explore the name in all countries). Measured by absolute frequency, it is the most numerous in Mexico, Nigeria, and Argentina. More prevalently, سيسيليا is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Cecilia, Sicilia | Philippines, Mexico, Nigeria, Argentina, Brazil |
| سيسيليا | Iran, Palestinian Territory, Syria, Algeria, Iraq |
| Sicília | Spain, Brazil |
Caecilia, Cecelia, Cecile, Cecilie, Cecilija, Cecylia, Cecília, Cecílie, Celia, Celina, Celine, Cilla, Cäcilie, Cèlia, Cécile, Cécilia, Célia, Céline, Silke, Sisilia, Селин, Селина, Селия, Селія, Сесилия, Сесиль, Силке, Целина, Цецилия, Цецилія, סילקה, סליה, סלין, ססיליה, سيليا, سيلين, カーシ, シラ, セシリア, セシル, セリア, 塞西莉亚, 席琳, 瑟林纳, 西尔克, and 西莉亚