Caius
2025 SSA
About Caius
Caius is classical and serious but also has a simple, joyful quality. There was a third century pope named Caius, as well as an early Christian writer, several Shakespearean characters, and a Twilight vampire. We would pronounce the name to rhyme with eye-us though at Cambridge University in England, where it's the name of a college, it's pronounced keys.
Nickname Cai is a definite asset.
Pronounced KY-us.
As of October 2026, Caius ranked #927 in US births in 2025 SSA, Nameberry popularity #273.
Popularity & trends
Data table
| Year | US rank | Births | Per million |
|---|---|---|---|
| 2014 | #1,376 | 124 | 64.6 |
| 2015 | #1,289 | 138 | 72 |
| 2016 | #1,224 | 153 | 80.6 |
| 2017 | #1,511 | 110 | 59.4 |
| 2018 | #1,361 | 130 | 71.6 |
| 2019 | #1,328 | 137 | 76.4 |
| 2020 | #1,209 | 156 | 90.4 |
| 2021 | #1,340 | 138 | 78.9 |
| 2022 | #1,282 | 150 | 85.9 |
| 2023 | #1,347 | 140 | 81.8 |
| 2024 | #1,061 | 205 | 119 |
| 2025 | #927 | 254 | 148.7 |
World rankings
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Caius on lists
Famous Caiuss
- Saint Caius
3rd century Bishop of Milan
- Caius
Presbyter of Rome, Christian writer
- Caius Gabriel Cibber
Danish sculptor
- Blessed Caius of Korea
Catholic missionary
- Caius Welcker
Dutch footballer
- John Caius
English physician and cofounder of Cambridge's Gonville and Caius College
- Pope Caius
3rd century Bishop of Rome
- Caius Kane Denman (b. 2018)
son of American film and television actor David Denman and Swedish,American actress Mercedes Mason
Caius in pop culture
- Caius
name taken by the Earl of Kent in Shakespeare's "King Lear"
- Caius
main character in Shakespeare's "Coriolanus"
- Caius
in the book "The Skystone" by Jack Whyte
- Caius
character in the Twilight series
- Caius Ballad
antagonist in the video game "Final Fantasy XIII,2"
- Gonville & Caius College
University of Cambridge
- Caius
character in the book "The Valiant" by Lesley Livingston