Cortlyn is of Welsh origin and means 'little heart'. It's a unisex name, but it's more commonly used for girls. The name has gained popularity in recent years due to its unique sound and spelling. Cortlyn is often associated with the Welsh princess, Gwenhwyfar, also known as Guinevere in Arthurian legend.
"Cortlyn has seen consistent popularity over time, with five babies given this unique name each in 1994, 2001, and 2014."