Is Caius a boy or girl name?
Caius is a boy name in the US. In 2024, 0 girls and 205 boys were named Caius, so 0% were girls. Across 1880–2024, 0% of the 2,074 US babies named Caius were girls.
- Boy rank, 2024
- #1,061
- Girl rank, 2024
- Not ranked
- Babies named Caius since 1994
- 2,074
- Most popular year
- 2024
- 205 babies
Boys and girls named Caius, by decade
Every year
| Year | Boys | Boy rank | Girls | Girl rank |
|---|---|---|---|---|
| 2024 | 205 | #1,061 | 0 | – |
| 2023 | 140 | #1,347 | 0 | – |
| 2022 | 150 | #1,282 | 0 | – |
| 2021 | 138 | #1,340 | 0 | – |
| 2020 | 156 | #1,209 | 0 | – |
| 2019 | 137 | #1,328 | 0 | – |
| 2018 | 130 | #1,361 | 0 | – |
| 2017 | 110 | #1,511 | 0 | – |
| 2016 | 153 | #1,224 | 0 | – |
| 2015 | 138 | #1,289 | 0 | – |
| 2014 | 124 | #1,376 | 0 | – |
| 2013 | 109 | #1,494 | 0 | – |
| 2012 | 74 | #1,924 | 0 | – |
| 2011 | 44 | #2,709 | 0 | – |
| 2010 | 49 | #2,520 | 0 | – |
| 2009 | 43 | #2,806 | 0 | – |
| 2008 | 27 | #3,840 | 0 | – |
| 2007 | 29 | #3,609 | 0 | – |
| 2006 | 15 | #5,557 | 0 | – |
| 2005 | 23 | #3,957 | 0 | – |
| 2004 | 14 | #5,537 | 0 | – |
| 2003 | 15 | #5,071 | 0 | – |
| 2002 | 13 | #5,438 | 0 | – |
| 2001 | 16 | #4,703 | 0 | – |
| 2000 | 10 | #6,381 | 0 | – |
| 1999 | 7 | #7,975 | 0 | – |
| 1998 | 0 | – | 0 | – |
| 1997 | 0 | – | 0 | – |
| 1996 | 0 | – | 0 | – |
| 1995 | 0 | – | 0 | – |
| 1994 | 5 | #8,977 | 0 | – |
Highest rank
As a boy name, Caius reached #1,061 in 2024. It has never been ranked as a girl name. Ranks count every name SSA published for that year and sex, so they go well past the top 1,000.
Names from the same era
These names were also most popular in the 2020s, with a similar number of babies. They can work as sibling or middle names that feel like they belong together.
Names spelled like Caius
Source: US Social Security Administration baby name data, 1880–2024. Counts are Social Security card applications for US births; SSA leaves out names given to fewer than 5 babies in a year. Updated 2026-10-05. How these numbers are made.