Noble
Addalyn is a modern American variation of Adeline, which is derived from the Germanic element 'adal' meaning noble. It combines the traditional roots of the name with the popular '-lyn' suffix, giving it a contemporary rhythmic feel.
Less common today
Addalyn isn't in the latest US Top 1000. It last peaked at #1,029 in 2016.
US births per 5-year period, 1990βpresent (SSA data).