Its source is Caoilinn, an Irish Gaelic name meaning "Slim and fair."
The name Kaila ranked 526th in popularity for females of all ages in a sample of 2000-2003 Social Security Administration statistics and 3075th in popularity for females of all ages in a sample of the 1990 US Census.
Though this name appears on the 1990 U.S. Census lists, it is used by only a small percentage of the general population.
Some authorities associate this name with the Yiddish name Kelila, meaning ''crown of laurel.'' Others believe it is a short form of Michaela.