Cassio

Cassio as a feminine name represents an intriguing gender crossover of what is traditionally a masculine name. The name derives from Latin origins, possibly related to the Roman family name Cassius, which may have meant "empty" or "vain." While predominantly used for boys, especially in Brazil and other Portuguese-speaking regions, its melodic ending makes it adaptable as a feminine choice. Cassio gained some recognition through Shakespeare's character in Othello. As a feminine name, it remains quite rare, appealing to parents seeking something distinctive with classical roots. The name carries an artistic, literary quality and projects both strength and elegance when used for a girl, making it a bold choice that balances traditional resonance with contemporary gender-neutral naming trends.

Pronounced KAS-ee-oh.

As of October 2026, Cassio ranked #9879 in US births in 2025 SSA, peaked at #9101 in 2024.