Meaning and Name Origin
Declan \d(e)-clan, dec-lan\ as a boys' 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 an uncommonly occurring given name for males and an uncommon last name too for all people. (2000 U.S. Census)
Presented below is the birth name popularity of Declan for boys. Declan was first listed in 1998 and reached its peak position of #121 in the U.S. in the year 2013, and is currently at #122. (2014 Birth Statistics)
A recommended similar baby name is Deccan. Like Declan, this name is not commonly used.