Boy Name · Latin Origin
Cassius
Last reviewed: June 2026
Cassius is a boy baby name of Latin origin, meaning "Empty, vain". It currently sits in the Rare tier of US baby names for 2026, and parents who love Cassius often also consider Cassian.
Names like Cassius
Frequently asked about Cassius
What does the name Cassius mean?
Cassius means "Empty, vain" and is of Latin origin.
What is the origin of Cassius?
Cassius originates in Latin naming tradition.
How do you pronounce Cassius?
Cassius has 7 letters and is most commonly stressed on the first syllable.
Is Cassius a boy's or girl's name?
Cassius is primarily used as a boy's name in US records.
How popular is Cassius in 2026?
In our 2026 popularity tracker, Cassius sits in the Rare tier — an uncommon, standout choice.
What names are similar to Cassius?
Names that share Cassius's sound and style include Cassian, Columbus, Cleatus, Cornelius, Caesar.