All over the world, Сесили (Cecily 
, Sesilya 
, Сесили 
) is quite a common feminine first name. The first name Сесили is characteristic of Hong Kong, where it is quite a rare female name, Australia, and the United States. Not in comparison with a country's population, this name is the most popular in the United States, Australia, and the United Kingdom. Very seldom, Сесили is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Cecily | Australia, Taiwan, Kenya, United States, United Kingdom |
| Sesilya | Tanzania, United States, India, Indonesia |
| Сесили | Russia |
Сесили is also a name for the fictitious and mythical characters: Cecily Fairchild , the fictional character from Mobile Suit Gundam F91; Cecily Frye , the fictional character in the Assassin's Creed series, Assassin's Creed Syndicate; Cecily Cardew , the fictional character, The Importance of Being Earnest and Cecily , the character from 2002 film 'A Ring of Endless Light'.