Kollyn is of Scottish origin, derived from the surname Macaulay. It means "son of Collen", where Collen is an old Scottish personal name meaning "strife". Kollyn is a unisex name, although it's more commonly used for males. It has not traditionally been very popular, but it has appeared on some baby lists in recent years. The name Kollyn can be associated with strength and resilience due to its meaning and Scottish heritage.
"Kollyn as a name had its peak popularity between 2006 and 2014 with over 10 births each year during that period. However, it has since seen a decline, with only five births recorded each year from 2018 onwards."