Caius is an uncommon boys' name that has climbed to its highest level yet, peaking in 2025.
Caius is a boy name. In 2025 it ranked #927 for boy births in the United States (and #1,897 across all names), given to 254 babies. Caius first appears in 1994 and peaked in 2025 (254 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 2025 | 254 | 254 | #927 |
| 2024 | 206 | 206 | #1,060 |
| 2023 | 140 | 140 | #1,347 |
| 2022 | 150 | 150 | #1,282 |
| 2021 | 138 | 138 | #1,341 |
| 2020 | 156 | 156 | #1,209 |
| 2019 | 137 | 137 | #1,328 |
| 2018 | 130 | 130 | #1,361 |
| 2017 | 110 | 110 | #1,512 |
| 2016 | 153 | 153 | #1,224 |
| 2015 | 138 | 138 | #1,289 |
| 2014 | 124 | 124 | #1,377 |
| 2013 | 109 | 109 | #1,494 |
| 2012 | 74 | 74 | #1,924 |
| 2011 | 44 | 44 | #2,709 |
| 2010 | 49 | 49 | #2,520 |
| 2009 | 43 | 43 | #2,806 |
| 2008 | 27 | 27 | #3,840 |
| 2007 | 29 | 29 | #3,610 |
| 2006 | 15 | 15 | #5,557 |
| 2005 | 23 | 23 | #3,958 |
| 2004 | 14 | 14 | #5,537 |
| 2003 | 15 | 15 | #5,072 |
| 2002 | 13 | 13 | #5,439 |
| 2001 | 16 | 16 | #4,703 |
| 2000 | 10 | 10 | #6,382 |
| 1999 | 7 | 7 | #7,975 |
| 1994 | 5 | — | #8,979 |