Kehley is of Irish origin, meaning "fifth". It's a variant spelling of the name Kayleigh, which is derived from the Irish word "Caoilfhionn", a compound of "caol" meaning "slender" and "fionn" meaning "fair". Kehley is often associated with the Irish language and culture.
"The name Kehley was quite popular in the late eighties, with five babies named Kehley born each in 1984 and again in 1987."