Meaning: Its source is a Latin expression meaning "Happy."

Languages: This boy's name was used in Latin.

Alternative Spellings: Kaius

Variant Forms: Caius

Narrative: This was a popular name in ancient Rome. It was the formal name of the infamous Roman emperor usually called Caligula, a nickname meaning ''little boots.'' This refered to the minature soldier's footgear he wore as a small boy growing up in his father's legionary camps.