Cognomen Сесилия (Cecilia 
, Cécilia 
, Cecília ) , in all the world, is a widespread surname. The family name Сесилия is habitual in 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 commonest in Mexico, Nigeria, and Argentina. More prevalently, Сесилия is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Cecilia | Philippines, Argentina, Brazil, Mexico, Nigeria |
| Cécilia | Spain, Sweden, Italy, United States, Democratic Republic of the Congo |
| Cecília | Argentina, Sweden, Italy, Brazil, United States |
| Сесилия | Russia |
Caecilia, Cecelia, Cecile, Cecilie, Cecilija, Cecylia, Cecílie, Celia, Celina, Celine, Cilla, Cäcilia, Cäcilie, Cèlia, Cécile, Célia, Céline, Sesilija, Sesiliya, Silke, Селин, Селина, Селия, Селія, Сесиль, Силке, Целина, Цецилия, Цецилія, סילקה, סליה, סלין, ססיליה, سيسيليا, سيليا, سيلين, カーシ, シラ, セシリア, セシル, セリア, 塞西莉亚, 席林, 席琳, 瑟林纳, 西利亚, 西尔克, and 西莉亚