Around the world, Kiljan (Cillian 
, Kiljan 
, Кильян 
) is a rare male first name. The given name Kiljan is habitual in Ireland, where it is quite a common boy's name, Australia, where it is a very rare boy's name, and the United Kingdom, where it is a very rare principally boy's, but very infrequently feminine name. Not in comparison with a country's population, this name is the most popular in Ireland, the United Kingdom, and India. Much less frequently, Kiljan is the last name as well as the forename.