The nameCaius
Caius is the old Latin form of Gaius, a great Roman first name.
- Boy's name
- Latin
- Feast day
Meaning
Caius comes from the Latin Gaius, perhaps linked to gaudere, "to rejoice".
Origin
Latin.
History
Gaius Julius Caesar is the most famous Roman with this first name. Gonville and Caius is a Cambridge college. In the United States Caius reached its best rank, 1061st, in 2024.
Famous people named Caius
- Saint Caius, pope
Popularity of the name Caius
Caius in the United States
Caius was most popular in the United States in the 2010s, with 1,068 births over the decade, 51% of all recorded babies named Caius. Its rise began around 2005, and it peaked in 2024. Half of all babies named Caius in the United States were born before 2018, so it is mostly a name of today's children and teenagers. Over the last five years on record, it has been rising: 158 births a year on average, against 134 in the five years before.
Caius in the United Kingdom
Caius was most popular in the United Kingdom in the 2010s, with 195 births over the decade, 39% of all recorded babies named Caius. Half of all babies named Caius in the United Kingdom were born before 2015, so it is mostly a name of today's children and teenagers. Over the last five years on record, it has been rising: 26 births a year on average, against 20 in the five years before.
Sibling names for Caius
Names from the same generation as Caius, whose popularity in the United States has followed a similar path.
How many people are named Caius? See the counter → · What would your name be in 1950? · Name origin quiz
Compare Caius with another name
Meaning, origin and popularity of Caius side by side with the name of your choice.
Caius in our baby name lists
Frequently asked questions
What does the name Caius mean?
Caius comes from the Latin Gaius, perhaps linked to gaudere, "to rejoice".
What is the origin of the name Caius?
Latin.
Is Caius a girl's or a boy's name?
Caius is a boy's name.
How popular is the name Caius?
In 2024, Caius was the 1062nd most popular name for baby boys in the United States, with 205 births.
What are good sibling names for Caius?
Names from the same generation, with a similar popularity in the United States: Violette, Kamilla, Estelle and Clementine for a sister, Jethro, Alistair, Bastian and Amadeus for a brother.
Who are famous people named Caius?
Saint Caius, pope.