Noble; son of Adam
Addasyn is a modern American creative spelling of Addison. It combines the traditional English surname meaning 'son of Adam' with the Germanic roots of 'Adelaide' meaning noble. The 'y' and 'n' suffix reflects contemporary naming trends for girls.
Less common today
Addasyn isn't in the latest US Top 1000. It last peaked at #7,861 in 2010.
US births per 5-year period, 1990βpresent (SSA data).