Head to head · Boys' names
Atreus vs Cassius
#582 vs #582 in 2025
Atreus and Cassius share the same spot on the 2025 charts (#582). The records cannot split them; sound and story will.
Cast your vote
Which one would you pick?
Your gut first, the numbers after — the split shows once you pick.
The tale of the tape
On the charts, Cassius leads 3 measures of 6; Atreus leads 1.
Ranks, counts and years are measured in the official US birth record; the classroom and living figures are estimates computed from it. The dot marks the side each measure favours on the charts — more common, not better.
What the records say
146 years of US births, drawn on one scale
Two curves, one scale
Who owned which decade
- 1880s: Atreus —, Cassius #691 — Cassius higher
- 1890s: Atreus —, Cassius #839 — Cassius higher
- 1900s: Atreus —, Cassius #1373 — Cassius higher
- 1910s: Atreus —, Cassius #2071 — Cassius higher
- 1920s: Atreus —, Cassius #2616 — Cassius higher
- 1930s: Atreus —, Cassius #3012 — Cassius higher
- 1940s: Atreus —, Cassius #2714 — Cassius higher
- 1950s: Atreus —, Cassius #3273 — Cassius higher
- 1960s: Atreus —, Cassius #1668 — Cassius higher
- 1970s: Atreus —, Cassius #2415 — Cassius higher
- 1980s: Atreus —, Cassius #2548 — Cassius higher
- 1990s: Atreus —, Cassius #2038 — Cassius higher
- 2000s: Atreus #12553, Cassius #1375 — Cassius higher
- 2010s: Atreus #6726, Cassius #721 — Cassius higher
- 2020s: Atreus #582, Cassius #542 — Cassius higher
Cassius stood higher in every recorded decade — 15 of 15.
Rank by decade
| Decade | Atreus | Cassius |
|---|---|---|
| 1880s | — | #691 |
| 1890s | — | #839 |
| 1900s | — | #1373 |
| 1910s | — | #2071 |
| 1920s | — | #2616 |
| 1930s | — | #3012 |
| 1940s | — | #2714 |
| 1950s | — | #3273 |
| 1960s | — | #1668 |
| 1970s | — | #2415 |
| 1980s | — | #2548 |
| 1990s | — | #2038 |
| 2000s | #12553 | #1375 |
| 2010s | #6726 | #721 |
| 2020s | #582 | #542 |
Average national rank across each decade. A dash means the name sat outside the recorded top of that decade.
The names themselves
Meaning, roots, sound and the people who carried each
Where each name comes from
Atreus
traditionally read as "fearless" — but the reading is not secure
Greek tradition linked the name to ἄτρεστος (atrestos), "unflinching, not trembling". Many modern scholars instead class Atreus as pre-Greek — a name already old when Greek speakers inherited it, with a meaning no longer recoverable. Both readings are seriously held, so the honest answer is that the "fearless" gloss is ancient and attractive rather than proven.
Ἀτρεύς (Ancient Greek) → Atreus (Latin) → Atreus (English)
How it traveled
Atreus (Ἀτρεύς) belongs to the earliest layer of Greek myth as a king of Mycenae, father of Agamemnon and Menelaus. Homer's Iliad refers to those two constantly by the patronymic Atreides, "son of Atreus", and in the fifth century BC Aeschylus made the cursed house of Atreus the spine of his Oresteia.
Cassius
Most often read as "empty, hollow, vain," from Latin cassus
Two positions compete. The standard proposal links the family name to the Latin adjective cassus, "empty" or "hollow" — the same root behind words for something void. The other holds that Cassius, like many old Roman clan names, is simply older than Latin etymology can reach, an Italic family label whose sense was already lost by the Republic. Roman nomina were inherited, not chosen for meaning, so the family carried it for centuries without anyone taking it as a description.
Cassius (Roman nomen) → Cassianus → Cassian → Cassio
How it traveled
Cassius began as a Roman nomen, the name of the gens Cassia, a family present in Rome's records from the early Republic onward. Its best-known bearer, Gaius Cassius Longinus, joined the conspiracy against Julius Caesar in 44 BC — which is how the name reached English readers, first through Roman historians and then through Shakespeare, who gave Cassius some of the most quoted lines in Julius Caesar.
Where a reading is contested the note says so — this page does not turn a guess into a fact. The chain is each name's recorded forms, oldest first; the story is its opening, told in full on the name's own page.
Out loud, and in short
Atreus
AY-tree-us
AY-tree-us is the usual American pronunciation and the one used in the video games. Closer to the Greek is AH-treh-oos, and some families use uh-TRAY-us. Any of the three is defensible, so it is worth settling on one early and saying it the same way every time.
- Trey — The most natural English clipping from the middle of the name; also long established as a given name in its own right in the US.
- Atti — Informal, family-level; follows the same pattern by which Atticus gives Atti.
- Ace — Informal playground-style shortening from the opening sound; stands alone as a name too.
Cassius
KASH-us
Two pronunciations circulate in American English: KASH-us, the more common, and the three-syllable KASS-ee-us, closer to the Latin KAS-see-oos. Both are correct; families generally pick one and repeat it.
- Cass — The default short form, used for boys and girls alike; also given on its own as a full name.
- Cash — An informal shortening that has grown alongside Cash as an independent given name for boys.
- Cas — A spelling variant of the same short form, more common in writing than in speech.
- Cassie — Heard occasionally, though in the US it attaches far more often to Cassandra and Cassidy, and reads as feminine to most ears.
Is it right for you
The differences that decide it, laid out by what you want
Choose by what you want
Choose Atreus if you want…
- a name on the way upup 160 places on the charts in five years
- a name with fewer syllablesAtreus is 2 syllables to Cassius's 3
- a newer arrivalAtreus entered the US charts in 2008
Choose Cassius if you want…
- a name past its most crowded yearsCassius is stepping back from its peak
- a name with more sound in itCassius runs 3 syllables, Atreus 2
- a long American recordCassius was already in use when US records began in 1880
Each line is a measured difference between the two names — a rank, a count, a recorded form — never a judgement of either. Save the one that answers your question; it lands on your shortlist.
The trade-offs, name by name
Atreus
Strengths
- A documented name with a continuous written record from Homer onward — not a modern coinage, whatever its current chart movement suggests.
- One spelling in Greek, Latin and English, so there is no competing variant to correct.
- Three syllables ending in -us, a shape American ears already know from Atticus, Julius and Marcus.
To consider
- The myth is genuinely dark. The house of Atreus involves a curse, a murdered brother's children served at a banquet, and generations of revenge. Nobody will quiz a preschooler about it, but a classics teacher may raise an eyebrow, and it is better to know now than later.
- For many people the name means one specific video game character. That association is strong right now and may fade, or may date the name to a particular stretch of years — the same way film and song names have before.
- Expect to spell it and to correct the stress. Atrius, Atreius and confusion with Atticus are all likely, and AY-tree-us versus AH-treh-oos will come up more than once.
Cassius
Strengths
- An unbroken written record from the Roman Republic to the present, so the spelling is already familiar to anyone who has read Shakespeare or Roman history.
- Two established one-syllable short forms, Cass and Cash, both in genuine use.
- Recognizable across Italian, Portuguese, Spanish and Polish in forms close enough that the name survives a border.
To consider
- The pronunciation genuinely splits: KASH-us and KASS-ee-us are both in use, so he will correct people, or be corrected, throughout his life. Choosing one early and using it consistently is most of the fix.
- The leading etymology, Latin cassus, means "empty" or "hollow" — an unappealing reading if a meaning matters to you, though Roman families inherited such names without ever treating them as descriptions.
- The strongest historical association is with the conspirator who helped kill Caesar, and Shakespeare's portrait of him is not flattering. Most people recall the name before the plot, but some readers will make the link.
Documented properties of each name — how it spells, travels and shortens — not opinions about the child.
With your last name
Say both in full. The notes are facts about letters and sound — a rhyme, a shared initial, the monogram — not a verdict on either name.
Type a last name to hear Atreus and Cassius in full.
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Decide together
Nobody names a baby alone
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More head-to-heads
Same measures, different pair. Sixty more are dealt daily in the arena.
Lists these names appear on
- Video game names in real use
- Victorian names ready for a second century
- Hero and god names for boys
- Dark academia names with candlelit gravitas
- all guides
Where Atreus and Cassius each sit in the library — alternatives in the same style, ranked by the same records.
Atreus or Cassius — the short answers
- Which is more popular, Atreus or Cassius?
- They tie in 2025: Atreus ranked #582 with 504 babies; Cassius ranked #582 with 504 babies.
- Which name is rising faster, Atreus or Cassius?
- Atreus. Over the last five years Atreus moved up 160 places; Cassius moved down 94 places.
- Which is the older name, Atreus or Cassius?
- Atreus entered the US charts in 2008; Cassius was already in use when US records began in 1880. On the American record, Cassius is the older name.
- How many people are named Atreus and Cassius?
- About 3,500 people named Atreus are estimated to be alive in the US today. About 9,200 people named Cassius are estimated to be alive in the US today.
- Will there be other Atreuss or Cassiuss in the classroom?
- Atreus will almost certainly be the only one in school. Cassius will almost certainly be the only one in school.
US figures from the Social Security Administration, 1880–2025. Votes are battle voters on this site, not the birth record. Data & methodology
Keep playing
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