Princess of the lake
A modern American compound name combining Sadie, a diminutive of the Hebrew Sarah, with the suffix -lynn. Sadie carries the traditional meaning of 'princess' or 'noblewoman,' while Lynn is derived from the Welsh word for 'lake.'
Less common today
Sadielynn isn't in the latest US Top 1000. It last peaked at #10,042 in 2015.
US births per 5-year period, 1990βpresent (SSA data).