Declan is an irish names that means "full of goodness". It is the name of a saint, and it's the birth name of singer Elvis Costello.
America has always been a country that loves to import exotic names from other countries, especially Irish names. Could the rising star Declan be the latest irish import to make a big impression for the next couple of decades? Perhaps. Let's see how it's been performing so far in the SSA ranking:
