Cassy

Cassy is a feminine diminutive of Cassandra, which derives from the Greek name Κασσάνδρα (Kassandra), meaning "she who entangles men." In Greek mythology, Cassandra was a Trojan princess blessed with the gift of prophecy but cursed so that no one would believe her predictions. Cassy offers a more casual, approachable alternative to the formal Cassandra, while maintaining its classic roots. The name gained moderate popularity in the United States during the 1970s and 1980s as a standalone name rather than just a nickname. Cassy also sometimes serves as a short form for Cassidy or Catherine. The name conveys a friendly, unpretentious quality while still connecting to its ancient mythological origins.

Pronounced KAS-ee.

As of October 2026, Cassy ranked #16002 in US births in 2019 SSA, peaked at #1283 in 1986.