Caius
Boy name · #928 in 2025 · Uniqueness 43/100
Caius is currently the #928 boy name in the United States — 254 babies received it in 2025. A decade ago it stood at #1287, so the name has been rising over the past ten years. Roughly one in every 7,087 boys born in 2025 was named Caius.
The 31-year story
Caius first appears in the Social Security records in 1994, when 5 boys received the name. Its all-time peak is essentially right now: 2025, with 254 babies and a rank of #927. Names at their peak can keep climbing — or be one trend cycle from the long slide that eventually hits most popular names. 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 Caius per year, 1880–2025. Source: SSA.
Unlock the 5-year forecast and compare Caius against up to 5 other names.
Uniqueness: will there be another Caius in class?
Caius scores 43 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 Caius is most common
Geography matters for names, and Caius is no exception. In 2025 the states with the most Caiuss were CA (30), TX (28), OH (12), TN (11), IN (10). Raw counts naturally favor populous states, but the spread still hints at where the name is part of the local naming culture.
Names like Caius
Statistically, parents drawn to Caius tend to be choosing among names with similar popularity arcs, era profiles, and sounds — the closest matches in our model are Kaius, Cassius, Aurelius, Lucius, and Ignatius.
KaiusCassiusAureliusLuciusIgnatiusYunusAriusZeus
Rank history (last 25 years)
| Year | Babies named Caius | Rank |
|---|---|---|
| 2025 | 254 | #927 |
| 2024 | 206 | #1060 |
| 2023 | 140 | #1346 |
| 2022 | 150 | #1282 |
| 2021 | 138 | #1339 |
| 2020 | 156 | #1209 |
| 2019 | 137 | #1327 |
| 2018 | 130 | #1360 |
| 2017 | 110 | #1510 |
| 2016 | 153 | #1221 |
| 2015 | 138 | #1287 |
| 2014 | 124 | #1375 |
| 2013 | 109 | #1492 |
| 2012 | 74 | #1923 |
| 2011 | 44 | #2699 |
| 2010 | 49 | #2511 |
| 2009 | 43 | #2800 |
| 2008 | 27 | #3823 |
| 2007 | 29 | #3591 |
| 2006 | 15 | #5525 |
| 2005 | 23 | #3941 |
| 2004 | 14 | #5492 |
| 2003 | 15 | #5035 |
| 2002 | 13 | #5395 |
| 2001 | 16 | #4676 |
Frequently asked questions
Is Caius a popular boy name?
Caius ranked #928 among boys in 2025 with 254 babies given the name — outside the top 500, making it an uncommon pick. Ten years earlier it ranked #1287.
When was the name Caius most popular?
Caius peaked in 2025, when 254 American boys received the name (ranked #927 that year). That peak is current — the name is at or near its all-time high right now.
How rare is the name Caius?
In 2025, roughly 1 in 7,087 newborn American boys was named Caius. It scores 43/100 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.