Surname キアラン (Ciaran 
, Ciarán 
, キアラン) , in the entire world, is a rare cognomen. The cognomen キアラン is characteristic of Ireland, where it is quite a rare surname, Uruguay, where it is a rare surname, and Hungary. Measured by absolute frequency, it is commonest in Ireland, Spain, and Uruguay. Predominantly, キアラン is the forename as well as the last name.