Cassidy
Meaning “curly-headed,” Cassidy is from Latin.
Cassidy
Meaning curly haired, Cassidy is an Irish name.
Cassie
“The purified one,” in allusion to the plant cassia whose medicinal properties are laxative, but ultimately from the Greek kathairein, to cleanse.
Cassandra
“A boyish girl,” from the Greek kassyo (to unite) and aner or andro (a male). In Greek legend, Cassandra was endowed with prophetic powers by Apollo, but when she denied him her love favors, Apollo decreed that her prophecies should not be believed.