Curly-haired
A modern phonetic spelling of the Irish surname Cassidy. It is derived from the Gaelic name Caiside, which originally functioned as a nickname for someone with curly hair.
Less common today
Kassadee isn't in the latest US Top 1000. It last peaked at #8,315 in 2014.
US births per 5-year period, 1990βpresent (SSA data).