Last name ג'יליאן (Gillian 
, ג'יליאן 
) , in all the world, is quite a common surname. The cognomen ג'יליאן is habitual in Cameroon, where it is quite a rare surname, Israel, and Honduras. In absolute terms, this name is the most popular in Cameroon, the United States, and Spain. Predominantly, ג'יליאן is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gillian | United Kingdom, Ireland, Australia, South Africa, United States |
| ג'יליאן | Israel |