Surname Сесил (Cecil 
, Sesil 
, Сесил 
) , globally, is a common last name. The cognomen Сесил is characteristic of the United States, where it is quite a rare surname, Kenya, and Australia. Not in comparison with a country's population, it is commonest in the United States, Kenya, and Indonesia. More frequently, Сесил is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Cecil | South Africa, Philippines, Ghana, United States, Canada |
| Sesil | Indonesia, United Kingdom, Philippines, United States, India |
| Сесил | Russia, Bulgaria |
| Sesyl | Philippines, Honduras, United States, India, Venezuela |