Caio
Truly rare: most Poles have never met a Caio, and the records show no boys given it since 2000. The name is Latin at root, from a word meaning "to rejoice".
Caio Pronunciation
Caio is pronounced TSAH-yo (/ˈt͡sajɔ/).
What Caio means
Where Caio comes from and what it has meant to the people who carry it.
Caio comes from Latin. It is the Italian form of the old Roman name Gaius, one of the most common first names a citizen of Rome could carry. Julius Caesar was a Gaius. So were countless soldiers, farmers, and senators whose names survive on stone.
The link to "to rejoice" runs through the Latin verb gaudere. Scholars have long connected Gaius with that root, and the sense of gladness stayed attached to the name as it passed into Italian. In Polish the meaning is given as "cieszący się," one who rejoices.
Modern Caio belongs to Italy, and also to Portuguese and Brazilian families who spell it the same way. The name is short. Two open syllables, easy to call across a room.
In a Polish szkoła the name still reads as foreign on a class register, an Italian guest among the Jakubs and Szymons. That foreignness is part of its appeal. A Polish child named Caio gets a Roman praenomen and a Latin word for gladness, cieszący się.
How many people are named Caio
1 in 402758 men in Poland is named Caio. 53 people carry it in the 2025 register: rank #5129 among male names.