Kristlyn is of American origin, derived from the Greek name Christina, which means "follower of Christ". The name gained popularity in the United States during the late 20th century, likely due to its unique sound and spelling while still being recognizable as a Christian name. Kristlyn is composed of the elements Kris (a shortened form of Christine or Kristine) and lyn, which is often associated with Lynette or other similar names. The nameKristlyn has been particularly popular in English-speaking countries such as the United States, Canada, Australia, and New Zealand since the 1980s.
Kristlyn saw its highest popularity between 2003 and 2005 with 15 births recorded during those years. The name's usage then decreased, with 5 births each year from 2008 to 2010 and again in 2021. Overall, Kristlyn has been given as a baby girl's name 60 times between 1995 and 2021.