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Caius meaning and name origin
Caius \caius\ as a boy's name is pronounced keys. It is of Latin origin, and the meaning of Caius is "happy". Common Roman form of Gaius. This was the name of the infamous Roman emperor called Caligula, a nickname meaning "little boots". This referred to the minature soldier's footwear he wore when he was young. A 16th-century English physician endowed a college at Cambridge University called "Gonville and Caius".
Caius has 7 variant forms: Cai, Caio, Kay, Kaye, Keye, Keyes and Keys.
Baby names that sound like Caius are Cass, Gus, Guus, Case, Casey, Cayce, Cacey, Cace, Caz and Kass.
View a list of the 4 names that reference Caius.
Popularity of Caius
Caius is not a popular first name for men and an equally uncommon surname or last name for all people. (1990 U.S. Census)
Displayed below is the baby names popularity of the name Caius for boys. (2010 statistics) Compare Caius with its variant forms and related boy baby names.