In the entire world, Cillian (Kilian
, Cillian
, كيليان) is a common male first name. The forename Cillian is characteristic of Ireland, where it is quite a common male name, Andorra, and Austria, where it is quite a rare masculine name. Measured by absolute frequency, it most frequently occurs in Germany, Tanzania, and France. Also, Cillian is the last name as well as the forename.
Cillian is also a name for the fictitious and mythical characters: Kilian , the operatic character in the opera Regina by Albert Lortzing; a clerk and Kilian , the operatic character in the opera Der Freischütz by Carl Maria von Weber; a wealthy peasant.
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