Cassius
Boy name · #582 in 2025 · Uniqueness 62/100
Cassius ranks #582 among American boys' names as of 2025, with 504 newborns given the name that year. A decade ago it stood at #644, so the name has been rising over the past ten years. Roughly one in every 3,571 boys born in 2025 was named Cassius.
The 145-year story
Cassius first appears in the Social Security records in 1880, when 17 boys received the name. Its peak came in 2021, when 607 boys were named Cassius — good for #487 that year. Today's parents encounter it on its way down the popularity curve, which for many parents is exactly the appeal. Following the curve matters more than today's snapshot: a name's position on its rise-peak-decline arc is the best predictor of how common it will feel in a kindergarten class five years from now.
Babies named Cassius per year, 1880–2025. Source: SSA.
Unlock the 5-year forecast and compare Cassius against up to 5 other names.
Uniqueness: will there be another Cassius in class?
Cassius scores 62 out of 100 on our uniqueness scale, which blends current rarity with five-year momentum — putting it in the "distinctive" band. That middle band is the sweet spot many parents hunt for: recognizable without being everywhere.
Where Cassius is most common
Like most names, Cassius's popularity isn't evenly spread across the country. In 2025 the states with the most Cassiuss were CA (56), TX (39), WA (28), NY (23), FL (22). Raw counts naturally favor populous states, but the spread still hints at where the name is part of the local naming culture.
Names like Cassius
Statistically, parents drawn to Cassius tend to be choosing among names with similar popularity arcs, era profiles, and sounds — the closest matches in our model are Caius, Kaius, Magnus, Ignatius, and Lucius.
CaiusKaiusMagnusIgnatiusLuciusKassiusAureliusMemphis
Rank history (last 25 years)
| Year | Babies named Cassius | Rank |
|---|---|---|
| 2025 | 504 | #582 |
| 2024 | 516 | #569 |
| 2023 | 509 | #575 |
| 2022 | 541 | #548 |
| 2021 | 607 | #487 |
| 2020 | 602 | #488 |
| 2019 | 554 | #514 |
| 2018 | 460 | #594 |
| 2017 | 467 | #582 |
| 2016 | 449 | #600 |
| 2015 | 406 | #644 |
| 2014 | 346 | #704 |
| 2013 | 300 | #757 |
| 2012 | 218 | #933 |
| 2011 | 240 | #873 |
| 2010 | 195 | #1005 |
| 2009 | 199 | #991 |
| 2008 | 213 | #946 |
| 2007 | 164 | #1115 |
| 2006 | 169 | #1058 |
| 2005 | 102 | #1442 |
| 2004 | 95 | #1456 |
| 2003 | 79 | #1591 |
| 2002 | 85 | #1483 |
| 2001 | 59 | #1871 |
Frequently asked questions
Is Cassius a popular boy name?
Cassius ranked #582 among boys in 2025 with 504 babies given the name — outside the top 500, making it an uncommon pick. Ten years earlier it ranked #644.
When was the name Cassius most popular?
Cassius peaked in 2021, when 607 American boys received the name (ranked #487 that year). Since 2021 the name has declined from that high.
How rare is the name Cassius?
In 2025, roughly 1 in 3,571 newborn American boys was named Cassius. It scores 62/100 on our uniqueness scale (rarity blended with momentum), which we classify as "distinctive".
Data source: U.S. Social Security Administration name statistics, 1880–2025, national and state files. Counts reflect Social Security card applications; names with fewer than 5 occurrences in a state-year are suppressed by the SSA.