Kayline is of French origin, derived from the medieval French word "caillou," which means "little stone." The name gained popularity during the Middle Ages and was often given to girls born around the time of Saint Kayline's feast day on December 3rd. It is a unique and uncommon name, with only a few historical figures sharing this moniker. In modern times, it has seen limited use but remains appealing due to its distinctive sound and French heritage.
The name Kayline experienced its peak popularity between 2006 and 2007 with 10 and 8 births respectively. After a decline in the late 2000s and early 2010s, it began to regain some traction by the mid-2010s, reaching another high of 9 births in 2011. However, its usage has been relatively stable over time with no significant trends or drastic fluctuations in popularity.