Dillan is an uncommon, yet appealing given name of Irish origin. It is derived from the ancient Irish surname 'Ó Diollú', which means 'descendant of Diollach'. Diollach itself is believed to have been a personal name of uncertain etymology, possibly meaning 'swift'. Despite its Irish roots, Dillan has gained popularity in recent times in various English-speaking countries. It's a unique choice for parents seeking a distinctive name with a touch of history and cultural heritage.
The name Dillan experienced significant fluctuations in popularity over the years, with a notable spike in 2003 (30 births) and again in 2008 (29 births). However, it seems to have been less popular in recent years, with fewer than 15 births annually since 2014. Overall, there were 374 babies named Dillan from 1993 to 2023.