Meaning and name origin
Declan \d(e)-clan, dec-lan\ as a boy's name is pronounced DECK-lan. It is of Irish origin. From Deaglán, which is of unknown meaning. The name of an Irish saint (sixth century). The singer Elvis Costello was born Declan Patrick McManus.
Declan is not a popular first name for males and an equally uncommon surname or last name for all people (2000 U.S. Census).
Displayed below is the baby name popularity of the name Declan for boys. Declan reached its highest rank of #121 in the U.S. in 2013. (2014 statistics).
A suggested similar baby name is Deccan. Like Declan, this name is not commonly used.