Cayo as a Baby Name. Meaning and Origin of Cayo

What is the meaning of the name Cayo ?

The baby name Cayo is a Male name , 2 syllables long and is pronounced Spanish: /ˈka.jo/ — KAH-yo.

Cayo is Latin in Origin.

Cayo is the Spanish form of the ancient Roman praenomen Gaius (also written Caius), reflecting the early Latin interchange of C and G. Its etymology is debated: many link it to Latin gaudere “to rejoice,” yielding the sense “joyful/rejoicer,” while others propose an Etruscan origin. In Spanish it is pronounced KAH-yo.

The name is ubiquitous in Roman history - borne by Gaius Julius Caesar, Gaius Octavius (Augustus), Gaius Marius, and Pliny (Gaius Plinius) - and appears in the New Testament and in Pope Saint Caius. Variants include Gaius/Caius (Latin/English) and Caio (Italian, Portuguese; common in Brazil); rarer forms are Gaio. Feminines Gaia and Caia exist; diminutive Cai occurs. In Italian, Caio is a placeholder name. Contemporary use is uncommon in Spain but seen in Latin America and among diaspora parents seeking a concise, ancient-rooted choice. Unrelatedly, Spanish cayo means “small island.”