Cailen is an uncommon yet captivating given name of Irish origin. It is derived from the Irish surname "Ó Ceallacháin," which means "descendant of Ceallachán." Ceallachán, in turn, is a compound of two elements: "ceallaigh," meaning "to struggle," and "án," signifying "little." Thus, Cailen could be interpreted as a name that connotes strength and resilience in small packages.
The name Cailen experienced its peak popularity between the years 2000 and 2009, with a total of 83 births recorded during this period. The highest number of babies named Cailen was in 2004 with 12 births.