Ocean, sea, or forgiveness
Kaio is a name with multiple etymological roots. In a Japanese context, it often combines kanji meaning 'ocean' or 'sea' with 'king' or 'world'. In Portuguese-speaking regions, it is a variant of Caio, which stems from the Roman name Gaius, meaning 'to rejoice'.
About 22 boys were named Kaio in 2025.
US births per 5-year period, 1990–present (SSA data).
Brazilian professional footballer
Olympic butterfly swimmer from Brazil
Deity also known as Kaio-sama · Dragon Ball Z
