Cassius
Gender: Boy
Meaning: Hollow, empty
Origin: Latin/Roman
Popularity: Ranked #583 in 2025 with 504 babies born.
History: Cassius is a Roman family name of uncertain origin, possibly meaning hollow. It was borne by Gaius Cassius Longinus, one of Julius Caesar's assassins. In modern times it is strongly associated with Muhammad Ali, who was born Cassius Clay, and has seen a notable revival.
Name length: 7 letters
How common is Cassius? About 1 in 6,604 babies born in 2025 were named Cassius, or roughly 1.4 per day in the United States.
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Frequently asked about Cassius
What does the name Cassius mean?
Cassius means “Hollow, empty” from Latin/Roman roots.
What is the origin of the name Cassius?
Cassius has Latin/Roman origin. The traditional meaning is “Hollow, empty”.
How popular is Cassius?
Cassius ranked #582 in 2025 — given to 504 babies that year.
When was Cassius most popular?
Cassius peaked in 2021 with 607 babies registered that year.
Is Cassius a boy or girl name?
Cassius is predominantly a boys' name — over 90% of Cassiuss in registered births are male.
Is the name Cassius rising or falling in popularity?
Cassius has risen 14846 spots in the rankings over the last 5 years — from #15428 in 2020 to #582 in 2025.
How long has Cassius been recorded?
Cassius appears in birth records across 117 years — from 1880 through 2025.