Cassius
/ˈkas.si.us/
Cassius is an ancient Roman family name (nomen) likely derived from the Latin cassus, meaning “hollow” or “empty.” Some scholars suggest a connection to cassis, meaning “helmet,” though this etymology is less widely accepted.
Gaius Cassius Longinus was one of the principal conspirators in the assassination of Julius Caesar in 44 BC. Shakespeare depicted him memorably in Julius Caesar as the lean and hungry instigator of the plot.
Cassius ranked No. 567 in 2024 with 516 births. Its nominal peak was No. 430 in 1880 with just 17 births, meaning its current usage dwarfs anything in the historical record.
What the name Cassius means
The name’s modern fame owes much to Cassius Clay, the birth name of Muhammad Ali. Born in 1942, Clay changed his name in 1964, but the original name retained a bold, fighter’s aura.
Three syllables — KASH-us — open with a strong, percussive sound and close softly. This contrast gives the name a distinctive rhythmic profile that feels both ancient and cool.
Cassius has climbed sharply in the 2020s, part of a broader revival of classical Roman names alongside Augustus, Atticus, and Felix. Parents are drawn to its gravitas and historical depth.
The name works particularly well for parents who want something recognizable yet uncommon. At 516 births, it is familiar enough to pronounce easily but rare enough to stand out in any classroom.
US popularity over time
Numerology and symbolism
Based on Pythagorean numerology — a traditional system linking name letters to numbers. Presented for cultural interest.
Famous people named Cassius
Cassius - similar names
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