Meaning & Origin
Addelyn is a girl's baby name of German origin, a variant spelling of Adeline, from the Germanic element adal meaning 'noble.' This spelling emerged as part of the Adelyn/Adaline/Adeline wave of the 2010s, when parents rediscovered this vintage Germanic name.
Addelyn captures the appeal of that whole family of names — soft, feminine, and quietly aristocratic — in a spelling that feels distinctly modern American.