Kileen is a unique and uncommon feminine given name of Irish origin, derived from the Irish surname Ó Caoláin, which translates to 'descendant of Caolán'. The name Caolán itself means 'slender' or 'fine', suggesting an elegant or refined character associated with this name. Kileen is typically pronounced as 'KEE-lin', with a long 'i' sound similar to 'kiln'. Despite its Irish roots, the name has gained some traction worldwide, particularly in countries where names of Irish origin are popular, such as Australia and New Zealand.
"The name Kileen experienced a peak in popularity with 16 births in 1960, but saw a significant decline thereafter, with fewer than 14 births annually until the late 1980s when it began to rise again, peaking at 7 births in both 1990 and 1993. Overall, there were 118 babies named Kileen between 1960 and 1998."