Noble kind
Adalinn is a modern American elaboration of the Germanic name Ada or Adeline. It combines the root 'adal', meaning noble, with the popular 'lynn' suffix, which often refers to a lake or pool in English contexts.
Less common today
Adalinn isn't in the latest US Top 1000. It last peaked at #9,506 in 2014.
US births per 5-year period, 1990βpresent (SSA data).