Noble or of noble kind
Adelynne is a modern American elaboration of Adeline, which itself is a French diminutive of Adele. It ultimately derives from the Germanic element 'adal', meaning noble, a root shared by many classic European names.
Less common today
Adelynne isn't in the latest US Top 1000. It last peaked at #2,355 in 2017.
US births per 5-year period, 1990βpresent (SSA data).