Last name Cillar (Cillar 
) , all around the world, is a very rare surname. The cognomen Cillar is habitual in Philippines, where it is a very rare surname, Croatia, and Germany, where it is an extremely rare surname. Very seldom, Cillar is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Cillar | Spain, Philippines, India, United States, Germany |