Keily is a spelling of Keely, an Irish name from the surname Ó Cadhla that means "slender" or "graceful"; in the United States it is also used as a short, phonetic spelling of Kaylee and is especially popular with Hispanic families. The name entered the top 1000 for the first time in 2018 at number 829, its best rank so far, has moved in and out of the list since and ranks 1191 in 2025.