The name Caitlin is a variation of Katherine or Catherine.
The name originated in Ireland as CaitlÃn [ˈkatʲlʲiËnʲ] and is the Gaelic variation of the Old French name Cateline [katlin], which was derived from Catherine, which was derived from the Ancient Greek ΑἰκατεÏίνη (Aikaterine). Catherine is attributed to St. Catherine of Alexandria and the Greek goddess Hecate.
So, yes, Caitlin is a saint name as there are a number of saints named Catherine or Katherine.
Caitlin Thomas's birth name is Caitlin Macnamara.
Caitlin Mileon's birth name is Caitlin O'Connell.
Caitlin Spurlock's birth name is Caitlin Alyssa Spurlock.
Caitlin Boyle's birth name is Caitlin Antisdale Boyle.
Caitlin Fein's birth name is Caitlin Ashley Fein.
Caitlin Carmichael's birth name is Caitlin Elizabeth Carmichael.
Caitlin Mowrey's birth name is Caitlin Rita Mowrey.
Caitlin Wachs's birth name is Caitlin Elizabeth Wachs.
Caitlin Glass's birth name is Caitlin Tiffany Glass.
Caitlin Joseph's birth name is Caitlin Louise Joseph.
Caitlin Keiper's birth name is Caitlin Beth Riley.
No Caitlin is an Irish name.