Kayliah is of American origin, derived from the combination of 'Kaya' and 'Liah', two names that have gained popularity independently in recent years. It first appeared on the Social Security Administration's list of baby names in 2017, suggesting it's a relatively new but quickly adopted name choice.
"Kayliah saw its peak popularity between 2012 and 2015 with 11 to 15 births per year. However, it maintained a consistent presence throughout the years, with at least one birth each year from 2000 to 2023, totaling 238 births."