The name Caitlyn is a girl's name of Irish origin. Caitlyn and is often added to lists like Girl Names Ending in Lyn and discussed in our forums with posts like "generation caf with interests + careers".
From the experts:
Cait, we love. Lyn, we don't. While the star of all variations of the 80s and 90s favorite Caitlin/Katelyn is losing its luster, the transgender athlete and former Kardashian spouse Bruce Jenner is propelling Caitlyn back into the spotlight as her new female name.