Kayleigh is a name of Irish origin that means "lieutenant." It was first used in the 19th century and has since gained popularity around the world. The name is often associated with strength, leadership, and intelligence due to its meaning. Despite being of Irish origin, Kayleigh is not particularly common in Ireland but has become more prevalent in other English-speaking countries such as the United States and Australia. In recent years, it has also been gaining popularity in other European countries like France and Spain.
The name Kayleigh peaked in popularity between the years of 2004 to 2008, with over 1200 births each year during this period. However, it has seen a significant decline since then, with only 466 births recorded in 2023.