Deaglan is an Irish name for boys. The meaning is `name of a saint` The name Deaglan is most commonly given to American boys. The name sounds like: Declan Similar names are: Deegan, Dagan, Dallan, Dalan, Daylan, Daelan, Keallan, Kealan, Teagan Found on https://www.pregnology.com/names/boys/Deaglan