Caitlyn is a name of Irish origin, derived from the ancient Celtic word "caitlin," which means "pure." It has been popularized in recent decades by prominent figures such as Caitlyn Jenner, an American television personality and retired Olympic gold medal-winning decathlete, who was formerly known as Bruce Jenner. While historically more prevalent among females, Caitlyn is now recognized as a unisex name.
The name Caitlyn has seen varied popularity over the years, with a noticeable spike in usage during the year 2004 when it reached its peak with 12 births. Prior to that, it maintained a steady presence with around five to six births per year between 1988 and 1998. However, it seems to have fallen out of favor after 2004 as there are no available statistics for subsequent years. In total, the name Caitlyn has been given to 34 newborns over this period.