Declan (given name)

Declan is a popular masculine given name of Irish origin. It is derived from the Irish name Deaglán, which is of uncertain etymology. Some sources suggest it may be related to the Gaelic words deagh, meaning "good" or "excellent," and lán, meaning "full." Thus, the name could be interpreted to mean "full of goodness" or "excellent in virtue."

Saint Declan (also known as Déaglán of Ardmore) was an early Irish saint who is considered one of the four principal saints of Munster. He is believed to have lived in the 5th century, predating Saint Patrick. His feast day is July 24th. The prominence of Saint Declan contributed significantly to the name's lasting appeal in Ireland.

The name Declan has been consistently popular in Ireland and has also gained popularity in other English-speaking countries, including the United States, Canada, and Australia. Its popularity is attributed to its strong Irish heritage, its pleasant sound, and its association with a respected historical figure.

Common nicknames for Declan include Dec and Decky.